128 579 281 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 2⁷⁷

TF target 2⁷⁷

P-1

B1 =	948000
B2 =	356489490

Status	Date	User	Residue	Shift	Type	Base
Verified	2024-08-18	Luke Durant	2B7B186BACA847DC	0	1	3

History

Date	User	Type	Result
2024-08-18	Luke Durant	CERT	PRP Certification CERT proof power = 9 Proof certified good
2024-08-18	Luke Durant	C-PRP	2B7B186BACA847DC PRP proof power = 9 PRP: Verified Proof certified good
2024-05-12	Resolver	NF-PM1	B1=948000, B2=356489490
2023-01-21	TravisJank	NF	no factor from 2^76 to 2^77
2023-01-21	TravisJank	NF	no factor from 2^75 to 2^76
2022-12-24	SRBase	NF	no factor from 2^74 to 2^75
2019-07-01	Niels_Mache_Nextcloud	NF	no factor from 2^73 to 2^74
2019-07-01	Niels_Mache_Nextcloud	NF	no factor from 2^72 to 2^73
2016-06-23	proxy2222	NF	no factor from 2^71 to 2^72
2016-06-14	proxy2222	NF	no factor from 2^70 to 2^71
2016-04-10	proxy2222	NF	no factor from 2^69 to 2^70
2016-02-22	proxy2222	NF	no factor from 2^68 to 2^69
2015-10-03	Numberwang	NF	no factor from 2^67 to 2^68
2015-01-15	el grocco	NF	no factor from 2^66 to 2^67
2012-09-30	subgenius	NF	no factor from 2^65 to 2^66
2010-11-09	Richard	NF	no factor from 2^64 to 2^65
2010-05-29	Jud McCranie	NF	no factor from 2^63 to 2^64