mersenneforum.org Is it possible to test an exponent > 79300000 ?
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 2005-11-04, 04:17 #1 Ding_Cong   Oct 2004 Shanghai,China 22 Posts Is it possible to test an exponent > 79300000 ? in the "prime95.chm" i read "The Test choice can be used to run a Lucas-Lehmer test on one Mersenne number. Enter the Mersenne number's exponent - this must be a prime number between 5 and 79300000." but ,if zhe prime number over 79300000, how can i do?
 2005-11-04, 08:50 #2 jinydu     Dec 2003 Hopefully Near M48 2×3×293 Posts If I remember correctly, the newer versions of prime95 allow testing of larger exponents, but I could be wrong. In any case, you can download the newest version at the main GIMPS website: www.mersenne.org (when it's not down)
2005-11-04, 11:50   #3
pacionet

Oct 2005
Italy

3·113 Posts

Quote:
 Originally Posted by Ding_Cong in the "prime95.chm" i read "The Test choice can be used to run a Lucas-Lehmer test on one Mersenne number. Enter the Mersenne number's exponent - this must be a prime number between 5 and 79300000." but ,if zhe prime number over 79300000, how can i do?
Do you really want to test such an exponent ? It takes about one year ...

2005-11-04, 16:29   #4
jinydu

Dec 2003
Hopefully Near M48

2×3×293 Posts

Quote:
 Originally Posted by pacionet Do you really want to test such an exponent ? It takes about one year ...
Depends on the speed of your computer...

My guess is that there is probably at least an order of magnitude difference between the fastest computers working on GIMPS and the slowest ones.

Last fiddled with by jinydu on 2005-11-04 at 16:29

 2005-11-04, 17:39 #5 garo     Aug 2002 Termonfeckin, IE 5×7×79 Posts Yeah it takes about one year to test a number in that range on the fastest computers. On slower ones it can take much longer.

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