11 256 199 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
2629611740526041390529167	25	81.1	2024-06-12 07:13:06

ECM

Digits	B1	Curves
25	50000	2 / 280

Estimated T-Level: 20.0 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	2000-11-15	Joseph W. Depenbusch	8A4C8BBE17A21592	1609863
Verified (Factored)	2004-06-12	Marc Getty / Phil Fizur	8A4C8BBE17A21592	1110967

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2024-06-12	vsh	87076DCB92BA8572	1	1137921	5	3

P-1 factors

Date	Factor	B1	B2
2024-06-12	2629611740526041390529167	10000000	20021278200

History

Date	User	Type	Result
2024-06-12	duncanwa	CERT	PRP Certification Proof certified good
2024-06-12	vsh	C-PRP	M11256199/2629611740526041390529167 : 87076DCB92BA8572 PRP proof power = 8 PRP: Verified Proof certified good
2024-06-12	vsh	F-PM1	Factor: 2629611740526041390529167 / (P-1, B1=10000000, B2=20021278200)
2024-04-30	vsh	NF-PM1	B1=7107200, B2=9240820050
2024-03-26	vsh	NF-PM1	B1=3553600, B2=4643977800
2024-03-25	vsh	NF-PM1	B1=1776800, B2=1511197380
2021-10-30	SRBase	NF	no factor from 2^71 to 2^72
2021-08-14	SRBase	NF	no factor from 2^70 to 2^71
2021-08-06	SRBase	NF	no factor from 2^69 to 2^70
2017-12-27	ramgeis	NF	no factor from 2^68 to 2^69
2017-12-27	ramgeis	NF	no factor from 2^67 to 2^68
2016-03-01	Yxinity	NF	no factor from 2^66 to 2^67
2015-05-22	Nesowa	NF	no factor from 2^65 to 2^66
2013-11-21	lycorn	NF	no factor from 2^64 to 2^65