74 940 277 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁵

TF target 2⁷⁴

P-1

B1 =	655000
B2 =	13100000

Status	Date	User	Residue	Shift	Software
Verified	2017-03-25	J Brian Watkins	B67A6CD50F6DD316	66413995	Windows,Prime95,v28.5,build 2
Verified	2025-02-06	Evgeniy Zavialov	B67A6CD50F6DD316	61486500	Windows 64-bit,Prime95,v30.19,build 20

History

Date	User	Type	Result
2025-02-06	Evgeniy Zavialov	C-LL	B67A6CD50F6DD316
2017-03-25	J Brian Watkins	C-LL	B67A6CD50F6DD316
2015-12-20	TheJudger	NF-PM1	B1=655000, B2=13100000, E=12
2015-12-11	Jannic Schaeren	NF	no factor TF: 74-75
2015-12-11	Jannic Schaeren	NF	no factor TF: 73-74
2015-12-07	el grocco	NF	no factor TF: 72-73
2015-08-29	Judge Hale	NF	no factor TF: 71-72
2013-05-11	Pung	NF	no factor TF: 70-71
2011-12-04	-anonymous-	NF	no factor TF: 1-70
2011-04-04	Carsten Kossendey	NF	no factor TF: 67-68
2011-04-04	Carsten Kossendey	NF	no factor TF: 66-67
2011-04-04	Carsten Kossendey	NF	no factor TF: 65-66
2010-09-26	-anonymous-	NF	no factor TF: 64-65
2005-02-12	ramgeis	NF	no factor TF: 1-61
2002-03-03	Joss	NF	no factor TF: 1-57