10 000 831 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

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

Trial Factored to 2⁷⁰

TF target 2⁶⁸

Factored

Factor	Digits	Bits	Date
646560662529991467527	21	69.1	old

P-1 factors

Date	Factors	B1	B2
2021-11-28	No new factors discovered	168000	144717300

Status	Date	User	Residue	Shift	Software
Factored	2000-06-28	Claude Barbe	2F2CAC19C3E48E70	2163883	Windows,Prime95,v19,(aka WV1)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2019-11-27	timbit	5D1E32176B159488	1	1193146	5	3
Verified	Certified Good	2021-01-16	rucio	5D1E32176B159488	1	588665	5	3

History

Date	User	Type	Result
2025-03-11	NStorm	NF-PM1	B1=1700000, B2=180175050
2025-03-07	NStorm	NF-PM1	B1=1700000, B2=28102614540
2025-03-07	NStorm	NF-PM1	B1=1700000, B2=193528566
2025-03-07	NStorm	F	Factor: 646560662529991467527 / TF: 69-70
2024-04-10	Joe S.	NF-PM1	B1=204000, B2=669251310
2022-03-13	LordJulius	NF	no factor TF: 66-67
2022-03-13	LordJulius	NF	no factor TF: 64-65
2022-03-13	LordJulius	NF	no factor TF: 65-66
2021-12-20	ViliamF	NF	no factor TF: 68-69
2021-11-28	ANONYMOUS	F-PM1	Factor: 646560662529991467527 / B1=168000, B2=144717300
2021-11-25	ANONYMOUS	F-PM1	Factor: 646560662529991467527 / B1=156000, B2=140327460
2021-07-26	ViliamF	NF	no factor TF: 67-68
2021-05-17	Numberwang	F-PM1	Factor: 646560662529991467527 / B1=92000, B2=3439000
2021-01-16	Ben Delo	CERT	Proof certified good
2021-01-16	rucio	C-PRP	Proof Certified Good Proof Power: 8
2019-11-27	timbit	C-PRP	M10000831/646560662529991467527 : 5D1E32176B159488
2003-09-09	-anonymous-	F-PM1	Factor: 646560662529991467527
2000-06-28	Claude Barbe	C-LL	2F2CAC19C3E48E70
2000-04-19	-anonymous-	NF	no factor TF: 1-64