138 277 717 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with PRP test

No factors below 2⁷⁷

TF target 2⁷⁷

P-1

B1 =	1172000
B2 =	1263916170

Status	Proof	Date	User	Residue	Shift	Type	Base
Verified	Certified Good Power=10	2025-09-09	Josh_Primes	18E809D774341666	0	1	3
Verified	Certified Good Power=8	2025-09-12	Terry Kim	18E809D774341666	47537965	1	3

History

Date	User	Type	Result
2025-09-12	ANONYMOUS	CERT	Proof certified good
2025-09-12	Terry Kim	C-PRP	18E809D774341666 Proof Certified Good Proof Power: 8
2025-09-09	Cong Shengzhuo	CERT	Proof certified good
2025-09-09	Josh_Primes	C-PRP	18E809D774341666 Proof Certified Good Proof Power: 10
2024-09-20	Luke Durant	NF-PM1	B1=1172000, B2=1263916170
2024-08-23	George Woltman	NF	no factor TF: 76-77
2024-07-14	SRBase	NF	no factor TF: 75-76
2023-01-15	SRBase	NF	no factor TF: 74-75
2021-08-02	SRBase	NF	no factor TF: 73-74
2020-10-23	SRBase	NF	no factor TF: 72-73
2016-09-19	Smok_bmv	NF	no factor TF: 71-72
2016-09-16	Smok_bmv	NF	no factor TF: 70-71
2016-09-12	nate.anders	NF	no factor TF: 69-70
2016-03-10	dbaugh	NF	no factor TF: 68-69
2016-02-15	Ready4PrimeTime	NF	no factor TF: 67-68
2015-02-07	vwflat4	NF	no factor TF: 66-67
2012-11-17	OS1	NF	no factor TF: 65-66
2010-12-03	Richard	NF	no factor TF: 64-65
2010-06-12	subgenius	NF	no factor TF: 63-64