128 461 759 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 =	627000
B2 =	627000

Status	Proof	Date	User	Residue	Shift	Type	Base
Verified	Certified Good Power=8	2025-01-27	MadPoo 🙂	1BC51E12BF640E95	88784621	1	3
Verified	Certified Good Power=8	2025-09-07	Rebecca	1BC51E12BF640E95	8593676	1	3

History

Date	User	Type	Result
2025-09-09	Massimo Cappelli (ik5pwa)	CERT	Proof certified good
2025-09-07	Rebecca	C-PRP	Proof Certified Good Proof Power: 8
2025-01-27	LookAS	CERT	Proof certified good
2025-01-27	MadPoo 🙂	C-PRP	Proof Certified Good Proof Power: 8
2024-06-25	Rebecca	NF-PM1	B1=627000
2023-01-16	Jason Lynch	NF	no factor TF: 76-77
2023-01-16	Kevin Jaget	NF	no factor TF: 75-76
2022-12-25	SRBase	NF	no factor TF: 74-75
2021-07-13	SRBase	NF	no factor TF: 73-74
2020-11-16	SRBase	NF	no factor TF: 72-73
2015-11-21	SourceBinary.com	NF	no factor TF: 71-72
2015-11-18	Judge	NF	no factor TF: 70-71
2015-11-13	La Güira	NF	no factor TF: 69-70
2015-11-13	La Güira	NF	no factor TF: 68-69
2015-11-13	La Güira	NF	no factor TF: 67-68
2015-01-14	el grocco	NF	no factor TF: 66-67
2012-09-29	sasaki3	NF	no factor TF: 65-66
2010-11-09	Richard	NF	no factor TF: 64-65
2010-05-29	Torchwood Institute	NF	no factor TF: 63-64