74 699 437 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

TF

No factors below 2⁷⁵

TF target 2⁷⁴

P-1

B1 =	655000
B2 =	13100000

Status	Date	User	Residue	Shift
Verified	2017-01-12	Chris Smith	7E01A8E96AB1D30D	9750279
Verified	2024-11-27	Salsa	7E01A8E96AB1D30D	1863419

History

Date	User	Type	Result
2024-11-27	Salsa	C-LL	7E01A8E96AB1D30D
2017-01-12	Chris Smith	C-LL	7E01A8E96AB1D30D
2016-04-02	Mark Rose	NF	no factor from 2^57 to 2^64
2015-12-13	TheJudger	NF-PM1	B1=655000, B2=13100000, E=12
2015-11-28	PDW	NF	no factor from 2^74 to 2^75
2015-11-28	PDW	NF	no factor from 2^73 to 2^74
2015-11-11	Bdot	NF	no factor from 2^72 to 2^73
2015-08-23	Judge Hale	NF	no factor from 2^71 to 2^72
2013-08-28	willmore	NF	no factor from 2^70 to 2^71
2012-10-20	SMoffat	NF	no factor from 2^69 to 2^70
2010-09-24	Helmut Zulus	NF	no factor from 2^68 to 2^69
2010-09-19	Helmut Zulus	NF	no factor from 2^67 to 2^68
2010-09-15	GrunwalderGIMP	NF	no factor from 2^66 to 2^67
2010-09-14	GrunwalderGIMP	NF	no factor from 2^65 to 2^66
2010-09-13	GrunwalderGIMP	NF	no factor from 2^64 to 2^65