142 965 421 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

No known factors, not tested for primality

TF

No factors below 2⁷⁷

TF target 2⁷⁷

P-1

B1 =	1229000
B2 =	1401624840

Assigned

Assigned	User	Work Type	Stage	% Done	Updated	Expired
2025-09-30	xx005fs	PRP test	PRP	3.09 %	2025-10-04

History

Date	User	Type	Result
2024-10-04	Luke Durant	NF-PM1	B1=1229000, B2=1401624840
2024-09-03	1997rj7	NF	no factor from 2^76 to 2^77
2023-12-28	1997rj7	NF	no factor from 2^75 to 2^76
2023-01-29	SRBase	NF	no factor from 2^74 to 2^75
2021-11-09	SRBase	NF	no factor from 2^73 to 2^74
2020-11-16	SRBase	NF	no factor from 2^72 to 2^73
2016-05-14	SRS Technology	NF	no factor from 2^71 to 2^72
2016-05-14	SRS Technology	NF	no factor from 2^70 to 2^71
2016-05-14	SRS Technology	NF	no factor from 2^69 to 2^70
2016-05-14	SRS Technology	NF	no factor from 2^68 to 2^69
2016-03-31	dbaugh	NF	no factor from 2^67 to 2^68
2015-02-24	aurashift	NF	no factor from 2^66 to 2^67
2012-12-12	-Anonymous-	NF	no factor from 2^65 to 2^66
2010-12-20	Richard	NF	no factor from 2^64 to 2^65
2010-06-17	sasaki3	NF	no factor from 2^63 to 2^64