141 209 909 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 =	1221000
B2 =	1439110860

Status	Date	User	Residue	Shift	Type	Base
Verified	2025-09-14	jerickson	75F525091215100B	0	1	3

History

Date	User	Type	Result
2025-09-14	MARK_DANA_ROCKMAN	CERT	PRP Certification CERT proof power = 10 Proof certified good
2025-09-14	jerickson	C-PRP	75F525091215100B PRP proof power = 10 PRP: Verified Proof certified good
2024-09-29	Luke Durant	NF-PM1	B1=1221000, B2=1439110860
2024-09-02	Luke Durant	NF	no factor from 2^76 to 2^77
2024-07-15	SRBase	NF	no factor from 2^75 to 2^76
2023-01-21	SRBase	NF	no factor from 2^74 to 2^75
2021-11-04	SRBase	NF	no factor from 2^73 to 2^74
2020-10-25	SRBase	NF	no factor from 2^72 to 2^73
2017-02-16	guru	NF	no factor from 2^71 to 2^72
2017-02-16	guru	NF	no factor from 2^70 to 2^71
2017-02-16	guru	NF	no factor from 2^69 to 2^70
2017-02-11	JoDu	NF	no factor from 2^68 to 2^69
2016-03-18	dbaugh	NF	no factor from 2^67 to 2^68
2015-02-18	tsc	NF	no factor from 2^66 to 2^67
2012-12-03	sasaki3	NF	no factor from 2^65 to 2^66
2010-12-13	Dalos Lee	NF	no factor from 2^64 to 2^65
2010-06-15	xiaowuc1	NF	no factor from 2^63 to 2^64