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Old 2022-05-25, 22:34   #111
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Sep 2002
Rep├║blica de California

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Originally Posted by nordi View Post
M36919 has a 180.968-bit (55-digit) factor: 2997347544642661833497896836795494793702018162645139063 (P-1,B1=2000000000,B2=401927737170960)

That gets me to the top of the list of P-1 factors for Mersenne numbers! And all thanks to the new version 30.8 of mprime.
Using the 3 now-known factors - a quite impressive collection - the cofactor is still composite [C11008], so this is no time to rest on your laurels. :)

Last fiddled with by ewmayer on 2022-05-28 at 18:43
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