New Mersenne Prime

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Jan 19, 2016, 8:39:11 AM1/19/16

to Mersenneplustwo

Congratulations to the Great Internet Mersenne Prime Search, who today released their latest Mersenne Prime discovery, M74207281.

I have started running TF on the new Mersenneplustwo, but so far have not found any factors of it...

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Jan 29, 2016, 3:49:50 AM1/29/16

to Mersenneplustwo

Desmond:gmp-tf james$ time ./mpptf16.gmp* -P74207281 -S1 -T1000000000000

999999900000

real 13905m1.945s

user 6766m6.848s

sys 17m3.947s

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Oct 10, 2016, 1:46:51 PM10/10/16

to Mersenneplustwo

[Mon Oct 10 18:42:25 2016]

2^74207281+1/3 is not prime. RES64: 699611E370B45F4A. Wd9: 01E2C8A8,00000000

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