121 501 609 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 =	893000
B2 =	457708860

Status	Date	User	Residue	Shift	Type	Base
Verified	2024-07-08	Luke Durant	3C8EC011F582ED11	0	1	3

History

Date	User	Type	Result
2024-07-10	George Woltman	CERT	PRP Certification CERT proof power = 8 Proof certified good
2024-07-08	Luke Durant	C-PRP	3C8EC011F582ED11 PRP proof power = 8 PRP: Verified Proof certified good
2024-02-21	steve_steve	NF-PM1	B1=893000, B2=457708860
2022-06-24	TheJudger	NF	no factor from 2^76 to 2^77
2021-09-14	DRobinsonPE	NF	no factor from 2^75 to 2^76
2021-08-22	rduerr	NF	no factor from 2^74 to 2^75
2021-07-05	SRBase	NF	no factor from 2^73 to 2^74
2020-09-21	tsc	NF	no factor from 2^72 to 2^73
2015-11-29	workerthread	NF	no factor from 2^71 to 2^72
2015-11-20	workerthread	NF	no factor from 2^70 to 2^71
2013-12-14	GrunwalderGIMP	NF	no factor from 2^69 to 2^70
2013-12-14	GrunwalderGIMP	NF	no factor from 2^68 to 2^69
2013-12-14	GrunwalderGIMP	NF	no factor from 2^66 to 2^68
2012-08-18	ramgeis	NF	no factor from 2^65 to 2^66
2010-10-21	sasaki3	NF	no factor from 2^64 to 2^65
2010-05-18	sasaki3	NF	no factor from 2^63 to 2^64