75 091 547 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	2016-01-03	benthomas	9D8057D8A8EEA92F	17482537	Windows 64-bit,Prime95,v28.7,build 1
Verified	2025-02-08	Pavel Bogdanov	9D8057D8A8EEA92F	66920835	Windows 64-bit,Prime95,v30.19,build 20

History

Date	User	Type	Result
2025-02-08	Pavel Bogdanov	C-LL	9D8057D8A8EEA92F
2016-01-03	benthomas	C-LL	9D8057D8A8EEA92F
2015-10-11	TheJudger	NF-PM1	B1=655000, B2=13100000, E=12
2015-10-01	1997rj7	NF	no factor TF: 74-75
2015-10-01	1997rj7	NF	no factor TF: 73-74
2015-09-03	1997rj7	NF	no factor TF: 72-73
2014-01-06	g0b	NF	no factor TF: 71-72
2013-07-08	processinfo	NF	no factor TF: 70-71
2013-05-20	PED	NF	no factor TF: 69-70
2010-10-09	HighFlyingPrimes	NF	no factor TF: 68-69
2010-10-03	HighFlyingPrimes	NF	no factor TF: 67-68
2010-07-29	wallu	NF	no factor TF: 66-67
2010-07-27	-anonymous-	NF	no factor TF: 65-66
2004-12-23	Marzbug	NF	no factor TF: 1-65
2004-07-26	Marzbug	NF	no factor TF: 1-65