138 244 783 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 =	1172000
B2 =	1276426470

Status	Date	User	Residue	Shift	Type	Base
Verified	2025-03-29	curtisc	407CB619487BE7B1	58991534	1	3

History

Date	User	Type	Result
2025-03-29	Queens_College_London	CERT	PRP Certification CERT proof power = 8 Proof certified good
2025-03-29	curtisc	C-PRP	407CB619487BE7B1 PRP proof power = 8 PRP: Verified Proof certified good
2024-09-19	Luke Durant	NF-PM1	B1=1172000, B2=1276426470
2024-08-21	Ryan Propper	NF	no factor from 2^76 to 2^77
2024-07-14	SRBase	NF	no factor from 2^75 to 2^76
2023-01-13	SRBase	NF	no factor from 2^74 to 2^75
2021-08-02	SRBase	NF	no factor from 2^73 to 2^74
2020-10-25	SRBase	NF	no factor from 2^72 to 2^73
2016-03-23	Mihai Preda	NF	no factor from 2^71 to 2^72
2016-03-18	dbaugh	NF	no factor from 2^70 to 2^71
2016-02-25	GustavEbbers	NF	no factor from 2^69 to 2^70
2016-02-18	Ready4PrimeTime	NF	no factor from 2^68 to 2^69
2016-02-15	Ready4PrimeTime	NF	no factor from 2^67 to 2^68
2015-02-07	nikosz	NF	no factor from 2^66 to 2^67
2012-11-16	subgenius	NF	no factor from 2^65 to 2^66
2010-12-02	sannerud.com	NF	no factor from 2^64 to 2^65
2010-06-12	Charles A. Morris	NF	no factor from 2^63 to 2^64