128 386 199 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 =	1114000
B2 =	1434937350

Status	Date	User	Residue	Shift	Type	Base
Verified	2024-08-11	Luke Durant	0962D24212884386	0	1	3

History

Date	User	Type	Result
2024-08-11	ManuelJC	CERT	PRP Certification CERT proof power = 9 Proof certified good
2024-08-11	Luke Durant	C-PRP	0962D24212884386 PRP proof power = 9 PRP: Verified Proof certified good
2024-07-25	Luke Durant	NF-PM1	B1=1114000, B2=1434937350
2023-01-21	TravisJank	NF	no factor from 2^76 to 2^77
2023-01-17	srow7	NF	no factor from 2^75 to 2^76
2022-12-23	SRBase	NF	no factor from 2^74 to 2^75
2021-07-13	SRBase	NF	no factor from 2^73 to 2^74
2020-10-23	SRBase	NF	no factor from 2^72 to 2^73
2016-01-06	dukla	NF	no factor from 2^71 to 2^72
2015-12-26	guru	NF	no factor from 2^70 to 2^71
2015-12-26	guru	NF	no factor from 2^69 to 2^70
2015-12-26	guru	NF	no factor from 2^68 to 2^69
2015-10-25	saffa	NF	no factor from 2^67 to 2^68
2015-01-13	el grocco	NF	no factor from 2^66 to 2^67
2012-09-29	linded	NF	no factor from 2^65 to 2^66
2010-11-07	Torchwood Institute	NF	no factor from 2^64 to 2^65
2010-05-29	oodaira	NF	no factor from 2^63 to 2^64