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Old 2011-12-27, 13:25   #683
BiBi
 
Oct 2011

2·7 Posts
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2611*2^1199467-1 is prime
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Old 2011-12-29, 02:41   #684
MyDogBuster
 
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May 2008
Wilmington, DE

22·709 Posts
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1445*2^751566-1 is prime
1449*2^751849-1 is prime
1995*2^752081-1 is prime
1767*2^752505-1 is prime
1895*2^753006-1 is prime
1561*2^754131-1 is prime
1575*2^755172-1 is confirmed prime
1685*2^755280-1 is prime
1743*2^756295-1 is prime
1437*2^756702-1 is prime
1875*2^758031-1 is prime
1539*2^758639-1 is prime
1939*2^971329-1 is prime
1683*2^759003-1 is prime
1647*2^759501-1 is prime
1911*2^761933-1 is prime
1405*2^765505-1 is confirmed prime
1455*2^766067-1 is confirmed prime
1533*2^769186-1 is prime
1913*2^769698-1 is prime
1529*2^770056-1 is prime
1719*2^770057-1 is prime
1557*2^771352-1 is prime
1623*2^772139-1 is prime
1717*2^774885-1 is prime
1975*2^775775-1 is prime
1785*2^777419-1 is prime
1993*2^778611-1 is prime
1903*2^779791-1 is prime
1763*2^781084-1 is prime
1571*2^782818-1 is prime
1929*2^784967-1 is prime
1917*2^785248-1 is prime
1851*2^786053-1 is prime
1435*2^786247-1 is prime
1547*2^786234-1 is prime
1661*2^786202-1 is prime
1425*2^795917-1 is prime
1425*2^809009-1 is prime
1797*2^811941-1 is prime
1789*2^813039-1 is prime
1885*2^815271-1 is prime
1749*2^815791-1 is prime
1647*2^816910-1 is prime
1809*2^817405-1 is prime
1927*2^817537-1 is prime
1405*2^820163-1 is prime
1965*2^822268-1 is prime
1683*2^829316-1 is prime
1759*2^835009-1 is prime
1961*2^838666-1 is prime
1709*2^842336-1 is prime
1623*2^844007-1 is prime
1669*2^846803-1 is prime
1525*2^847179-1 is prime
1881*2^850431-1 is prime
1679*2^852748-1 is prime
1531*2^853005-1 is prime
1965*2^862277-1 is prime
1485*2^864202-1 is confirmed prime
1493*2^886612-1 is prime
1695*2^890999-1 is prime
1475*2^893812-1 is prime
1533*2^896832-1 is prime
1939*2^903209-1 is prime
1743*2^907678-1 is prime
1517*2^915324-1 is prime
1483*2^917551-1 is prime
1579*2^920237-1 is prime
1719*2^923513-1 is prime
1883*2^925950-1 is prime
1587*2^926418-1 is prime
1501*2^926537-1 is prime
1665*2^927270-1 is prime
1939*2^927939-1 is prime
1459*2^931721-1 is prime
1951*2^934209-1 is prime
1755*2^935235-1 is prime
1965*2^935506-1 is prime
1581*2^936473-1 is prime
1965*2^937658-1 is prime
1849*2^938765-1 is prime
1713*2^942140-1 is prime
1503*2^943968-1 is prime
1545*2^946280-1 is confirmed prime
1973*2^954180-1 is prime
1887*2^954297-1 is prime
1925*2^954860-1 is prime
1515*2^955219-1 is confirmed prime
1527*2^955261-1 is prime
1407*2^955848-1 is prime
1641*2^955910-1 is prime
1845*2^955940-1 is confirmed prime
1849*2^957497-1 is prime
1561*2^961803-1 is prime
1817*2^961820-1 is prime
1945*2^962287-1 is prime
1555*2^968195-1 is prime
1775*2^982446-1 is prime
1775*2^982466-1 is prime

Last fiddled with by MyDogBuster on 2013-01-28 at 15:35
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Old 2012-03-11, 20:19   #685
BiBi
 
Oct 2011

2·7 Posts
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2625*2^705729-1 is Prime
2637*2^735813-1 is Prime
2639*2^892140-1 is Prime
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Old 2012-05-02, 05:55   #686
gd_barnes
 
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May 2007
Kansas; USA

3×11×307 Posts
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1997*2^789106-1 is prime
1581*2^801749-1 is prime
1797*2^804170-1 is prime
1441*2^804949-1 is prime
1875*2^808140-1 is prime
1727*2^808830-1 is prime
1829*2^810156-1 is prime
1623*2^810722-1 is prime
1965*2^810902-1 is prime
1461*2^815797-1 is prime
1609*2^816287-1 is prime
1585*2^818787-1 is prime
1813*2^819515-1 is prime
1517*2^819560-1 is prime
1757*2^826908-1 is prime
1801*2^827715-1 is prime
1715*2^828998-1 is prime
1947*2^830773-1 is prime
1473*2^832307-1 is prime
1611*2^834475-1 is prime
1841*2^834490-1 is prime
1623*2^834496-1 is prime
1573*2^835003-1 is prime
1557*2^836533-1 is prime
1737*2^837364-1 is prime
1977*2^838330-1 is confirmed prime
1917*2^838366-1 is prime
1855*2^840005-1 is prime
1811*2^841290-1 is prime
1595*2^844326-1 is prime
1767*2^845208-1 is prime
1575*2^845854-1 is confirmed prime
1471*2^848765-1 is confirmed prime
1665*2^849565-1 is prime
1953*2^854186-1 is prime
1729*2^855041-1 is prime
1907*2^856620-1 is prime
1919*2^856748-1 is prime
1559*2^867216-1 is prime
1451*2^878482-1 is prime
1545*2^887559-1 is confirmed prime
1559*2^890736-1 is prime
1635*2^901146-1 is prime
1787*2^901624-1 is prime
1971*2^903473-1 is prime
1875*2^907377-1 is prime
1715*2^913784-1 is prime
1461*2^914626-1 is prime
1601*2^938238-1 is prime
1667*2^955372-1 is prime
1781*2^956718-1 is prime
1449*2^956908-1 is prime
1839*2^957052-1 is prime
1587*2^957250-1 is prime
1639*2^957719-1 is prime
1495*2^958707-1 is prime
1463*2^960642-1 is prime
1433*2^960990-1 is prime
1699*2^961715-1 is prime
1405*2^961819-1 is prime
1557*2^963773-1 is prime
1713*2^964268-1 is prime

Last fiddled with by gd_barnes on 2012-12-27 at 22:06 Reason: add primes
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Old 2012-07-17, 18:27   #687
BiBi
 
Oct 2011

11102 Posts
Default new Primes

2607*2^746784-1 Prime
2625*2^785048-1 Prime
2641*2^785263-1 Prime
2603*2^785642-1 Prime
2613*2^801418-1 Prime
2637*2^811350-1 Prime
2625*2^821218-1 Prime
2625*2^950966-1 Prime
2625*2^971577-1 Prime
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Old 2012-07-29, 16:10   #688
MyDogBuster
 
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May 2008
Wilmington, DE

54248 Posts
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Lennart found:

1741*2^855823-1 is prime
1785*2^861263-1 is prime
1875*2^861773-1 is prime
1491*2^862427-1 is prime
1767*2^862466-1 is prime
1611*2^862979-1 is prime
1815*2^863743-1 is confirmed prime
1419*2^864873-1 is prime
1557*2^865137-1 is prime
1553*2^865550-1 is prime
1713*2^866286-1 is confirmed prime
1989*2^870095-1 is prime
1521*2^866017-1 is prime
1887*2^867789-1 is prime
1737*2^872414-1 is prime
1741*2^872473-1 is prime
1459*2^874001-1 is prime
1671*2^875286-1 is prime
1659*2^875660-1 is prime
1751*2^878882-1 is prime
1447*2^878897-1 is prime
1401*2^879085-1 is prime
1741*2^880129-1 is prime
1629*2^881095-1 is prime
1519*2^882995-1 is prime
1623*2^883904-1 is prime
1485*2^885917-1 is confirmed prime
1715*2^887810-1 is prime
1817*2^887886-1 is prime
1539*2^892704-1 is prime
1479*2^893115-1 is prime
1609*2^894225-1 is prime
1943*2^894960-1 is prime
1855*2^895961-1 is prime
1703*2^896842-1 is prime
1795*2^897421-1 is prime
1761*2^899745-1 is prime
1501*2^900791-1 is prime
1925*2^904436-1 is prime
1615*2^906533-1 is prime
1605*2^916302-1 is prime
1789*2^917705-1 is prime
1473*2^918479-1 is prime
1907*2^918720-1 is prime
1945*2^919349-1 is prime
1599*2^919443-1 is prime
1609*2^920015-1 is prime
1575*2^920488-1 is confirmed prime
1405*2^920873-1 is prime
1965*2^941477-1 is prime
1883*2^942694-1 is prime
1581*2^944983-1 is prime
1845*2^948584-1 is confirmed prime
1997*2^948796-1 is prime
1613*2^948976-1 is prime
1737*2^951913-1 is prime
1581*2^953215-1 is prime
1725*2^967890-1 is prime
1433*2^967914-1 is prime
1767*2^967994-1 is prime
1603*2^968823-1 is prime
1909*2^969667-1 is prime
1679*2^969772-1 is prime
1533*2^971674-1 is prime
1839*2^972724-1 is prime
1689*2^972924-1 is prime
1447*2^973977-1 is prime
1461*2^973877-1 is prime
1647*2^974289-1 is prime
1703*2^976168-1 is prime
1807*2^976297-1 is prime
1699*2^977205-1 is prime
1431*2^979918-1 is prime
1995*2^981097-1 is prime
1551*2^981306-1 is prime
1485*2^982274-1 is confirmed prime
1907*2^984254-1 is prime
1707*2^985681-1 is prime
1423*2^986667-1 is prime
1491*2^993334-1 is prime
1435*2^993755-1 is prime
1695*2^994681-1 is prime
1999*2^995331-1 is prime
1495*2^995529-1 is prime
1731*2^995923-1 is prime
1737*2^996637-1 is prime
1515*2^996848-1 is confirmed prime

Last fiddled with by gd_barnes on 2013-06-11 at 07:32
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Old 2020-04-24, 07:31   #689
kar_bon
 
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Mar 2006
Germany

2,801 Posts
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I've reanimated my k=1471 search at n=1.71M and found this for now:

1471*2^1772755-1 is prime! (533656 decimal digits)
Continuing.
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