74 342 987 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 PRP test

TF

No factors below 2⁷⁵

TF target 2⁷⁴

P-1

B1 =	640000
B2 =	12640000

Status	Date	User	Residue	Shift
Unverified	2016-05-23	Stuart Tomares	8A713873C4BCC5__	20458716

Status	Date	User	Residue	Shift	Type	Base
Verified	2024-11-26	Luke Durant	71BBCD88CB2758D6	0	1	3

History

Date	User	Type	Result
2024-11-26	Dt12	CERT	PRP Certification CERT proof power = 9 Proof certified good
2024-11-26	Luke Durant	C-PRP	71BBCD88CB2758D6 PRP proof power = 9 PRP: Verified Proof certified good
2016-05-23	Stuart Tomares	C-LL	8A713873C4BCC5__
2015-07-26	TheJudger	NF-PM1	B1=640000, B2=12640000, E=6
2015-07-19	kdgehman	NF	no factor from 2^74 to 2^75
2015-07-19	kdgehman	NF	no factor from 2^73 to 2^74
2015-07-19	kdgehman	NF	no factor from 2^72 to 2^73
2015-07-19	kdgehman	NF	no factor from 2^71 to 2^72
2013-05-09	rx7350	NF	no factor from 2^70 to 2^71
2012-10-24	arnaud	NF	no factor from 2^69 to 2^70
2010-08-01	subgenius	NF	no factor from 2^68 to 2^69
2010-07-29	Gnorfe	NF	no factor from 2^67 to 2^68
2010-07-24	unconnected	NF	no factor from 2^66 to 2^67
2010-07-16	unconnected	NF	no factor from 2^65 to 2^66
2010-07-13	primel	NF	no factor from 2^64 to 2^65
2008-09-12	lycorn	NF	no factor to 2^64