4 767 181 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
13035857077345565996881	23	73.5	2021-09-02 00:23:44

ECM

Digits	B1	Curves
25	50000	9 / 280

Estimated T-Level: 20.2 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)	1998-07-05	Kenneth E. Hutchcraft III	035D786C9BF6836B	0
Verified (Factored)	2000-03-01	John Maurice	035D786C9BF6836B	1666112

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-09-02	LaurV	D853D8A57B11218F	1	1332843	5	3

P-1 factors

Date	Factor	B1	B2
2021-09-02	13035857077345565996881	8919937	8919937

History

Date	User	Type	Result
2022-09-09	USAFSS	NF-PM1	B1=280000, B2=113636670
2021-09-02	LordJulius	CERT	PRP Certification Proof certified good
2021-09-02	LaurV	C-PRP	M4767181/13035857077345565996881 : D853D8A57B11218F PRP proof power = 7 PRP: Verified Proof certified good
2021-09-02	LaurV	F-PM1	Factor: 13035857077345565996881 / (P-1, B1=8919937)
2021-08-31	One Man	NF	no factor from 2^70 to 2^71
2021-08-21	SRBase	NF	no factor from 2^69 to 2^70
2021-05-03	TJAOI	NF	no factor from 2^68 to 2^69
2018-09-25	Yxinity	NF	no factor from 2^67 to 2^68
2017-12-11	Yxinity	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^61
2015-07-15	snme2pm1	NF	no factor from 2^65 to 2^66
2015-01-09	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-09	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-09-29	Squeeky_Squirrel	NF-PM1	B1=165000, B2=4166250, E=6
2011-11-05	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-05-26	markr	NF	no factor from 2^61 to 2^62
2009-09-08	Carsten Kossendey	NF-PM1	B1=30000, B2=412500