128 575 361 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 =	1123000
B2 =	1518507900

Status	Date	User	Residue	Shift	Type	Base
Verified	2024-08-25	Luke Durant	F47232541E5F7FD1	116786011	1	3

History

Date	User	Type	Result
2024-08-25	Poao	CERT	PRP Certification CERT proof power = 8 Proof certified good
2024-08-25	Luke Durant	C-PRP	F47232541E5F7FD1 PRP proof power = 8 PRP: Verified Proof certified good
2024-07-26	Luke Durant	NF-PM1	B1=1123000, B2=1518507900
2023-01-20	TravisJank	NF	no factor from 2^76 to 2^77
2023-01-20	TravisJank	NF	no factor from 2^75 to 2^76
2022-12-24	SRBase	NF	no factor from 2^74 to 2^75
2021-07-13	SRBase	NF	no factor from 2^73 to 2^74
2020-10-20	SRBase	NF	no factor from 2^72 to 2^73
2015-11-11	Bronzeman	NF	no factor from 2^71 to 2^72
2015-11-11	Bronzeman	NF	no factor from 2^70 to 2^71
2015-11-11	Bronzeman	NF	no factor from 2^69 to 2^70
2015-10-28	Bronzeman	NF	no factor from 2^68 to 2^69
2015-10-02	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
2010-11-08	Charles A. Morris	NF	no factor from 2^64 to 2^65
2010-05-30	garo	NF	no factor from 2^63 to 2^64