POST LOTS AND LOTS AND LOTS OF PRIMES HERE - Page 14

lsoule · 2006-01-25, 05:59

Congratulations!

grobie · 2006-01-25, 10:28

Very Nice:surprised

grobie · 2006-01-26, 04:00

From Choose your own k:

1222853775*2^272173-1 (81942 digits)

Cruelty · 2006-01-26, 14:29

Quote:

Originally Posted by Kosmaj

97*2^843205-1 is prime! [253832 digits]

This is quite a gap... previous prime for k=97 has been found 12 years ago at n=6981 :surprised

lsoule · 2006-01-26, 14:40

22932195*2^217722-1 (65549 digits)

it'll be on the list for about 3 weeks

amphoria · 2006-01-26, 19:29

From choose your own k:

5169615*2^267293-1 (80470 digits)

lsoule · 2006-01-27, 14:35

From the RPS drive:
918332415*2^294041-1 (88525 digits)

amphoria · 2006-01-27, 23:43

From choose your own k:

5169615*2^271290-1 (81674 digits)

Kosmaj · 2006-01-28, 02:27

Quote:

Originally Posted by Cruelty

This is quite a gap... previous prime for k=97 has been found 12 years ago at n=6981 :surprised

Guys, thanks for your kind comments. I knew that the previous prime for k=97 was at n=6981 but had no idea that it was found 12 years ago, and as I see now, by famous Mr. Dubner! It was the only k with no k*2^n-1 primes for n>10000. Special thanks are due to David Broadhurst who checked k=97 in the 200-800k range, and also to Thomas Masser (60-200k) and Tom Kuechler (16-60k). The range completion details are based on Dr. Keller's records.

lsoule · 2006-01-28, 14:31

854917635*2^279210-1 (84060 digits)

lsoule · 2006-01-29, 06:17

223*2^307755-1 (92646 digits)

2006-01-26, 04:00	#146
grobie Sep 2005 Raleigh, North Carolina 337 Posts	k=1222853775 From Choose your own k: 1222853775*2^272173-1 (81942 digits)

2006-01-26, 19:29	#149
amphoria "Dave" Sep 2005 UK 2³×347 Posts	From choose your own k: 51696152^267293-1 (80470 digits) Last fiddled with by amphoria on 2006-01-26 at 19:30*

2006-01-27, 23:43	#151
amphoria "Dave" Sep 2005 UK AD8₁₆ Posts	From choose your own k: 51696152^271290-1 (81674 digits) Last fiddled with by amphoria on 2006-01-27 at 23:44*

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2006-01-25, 05:59	#144
lsoule Nov 2004 California 11010101000₂ Posts	Congratulations!

2006-01-25, 10:28	#145
grobie Sep 2005 Raleigh, North Carolina 337 Posts	Very Nice:surprised

2006-01-26, 14:40	#148
lsoule Nov 2004 California 3250₈ Posts	22932195*2^217722-1 (65549 digits) it'll be on the list for about 3 weeks

2006-01-27, 14:35	#150
lsoule Nov 2004 California 2³×3×71 Posts	From the RPS drive: 918332415*2^294041-1 (88525 digits)

2006-01-28, 14:31	#153
lsoule Nov 2004 California 2³×3×71 Posts	854917635*2^279210-1 (84060 digits)

2006-01-29, 06:17	#154
lsoule Nov 2004 California 2³×3×71 Posts	223*2^307755-1 (92646 digits)