75 115 501 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 =	625000
B2 =	12031250

Status	Date	User	Residue	Shift	Software
Verified	2016-01-04	C. Williamson	CA7E3E34F7954879	73879321	Linux 64-bit,Prime95,v28.7,build 1
Verified	2025-03-20	Dmitriy Degtiarev	CA7E3E34F7954879	35223285	Linux 64-bit,Prime95,v30.3,build 6

History

Date	User	Type	Result
2025-03-20	Dmitriy Degtiarev	C-LL	CA7E3E34F7954879
2016-01-04	C. Williamson	C-LL	CA7E3E34F7954879
2015-12-06	PPed72	NF-PM1	B1=625000, B2=12031250, E=6
2015-11-23	AirSquirrels	NF	no factor TF: 74-75
2015-11-23	AirSquirrels	NF	no factor TF: 73-74
2015-10-18	1997rj7	NF	no factor TF: 72-73
2015-09-01	Chuck	NF	no factor TF: 71-72
2013-05-15	timc995	NF	no factor TF: 70-71
2012-12-09	vichico	NF	no factor TF: 69-70
2010-08-11	wolcit	NF	no factor TF: 68-69
2010-08-03	SAHS Science Dept	NF	no factor TF: 67-68
2010-08-01	tmorrow	NF	no factor TF: 66-67
2010-07-29	tmorrow	NF	no factor TF: 65-66
2004-12-23	Marzbug	NF	no factor TF: 1-65
2004-09-16	Marzbug	NF	no factor TF: 1-65
2004-04-20	Marzbug	NF	no factor TF: 1-63