3 126 293 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
40271107901340212054401	23	75.1	2021-02-22 23:02:31

ECM

Digits	B1	Curves
25	50000	41 / 280

Estimated T-Level: 20.7 ⓘ

TF below 2^64 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		John Durbetaki	5EFF4247387A80C3	0
Verified (Factored)	1999-06-26	Dr. David Bonnell	5EFF4247387A80C3	614873

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-02-24	LaurV	F7A5053E260C26D1	1	603597	5	3

History

Date	User	Type	Result
2022-08-21	Joss	NF-PM1	B1=3126293, B2=354763500
2021-02-24	curtisc	CERT	PRP Certification Proof certified good
2021-02-24	LaurV	C-PRP	M3126293/40271107901340212054401 : F7A5053E260C26D1 PRP proof power = 7 PRP: Verified Proof certified good
2021-02-22	mnd9	F-ECM	Factor: 40271107901340212054401 / (ECM curve 5, B1=50000, B2=5000000, Sigma=7088428330342135)
2019-01-14	TJAOI	NF	no factor from 2^67 to 2^68
2018-07-15	Joss	NF-PM1	B1=1820000, B2=5460000, E=6
2017-04-15	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-10-01	Squeeky_Squirrel	NF-PM1	B1=195000, B2=5460000, E=12
2015-06-14	Tha	NF	no factor from 2^65 to 2^66
2015-02-11	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-11	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-07	dbaugh	NF	no factor from 2^62 to 2^63
2011-11-15	markr	NF	no factor from 2^61 to 2^62
2011-08-29	Squeeky_Squirrel	NF-PM1	B1=105000, B2=2152500, E=6
2009-07-03	Carsten Kossendey	NF-PM1	B1=15000, B2=180000
2009-04-14	S485122	NF	no factor from 2^60 to 2^61