3 122 879 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
15624461327532720888047	23	73.7	2021-05-01 22:50:17

ECM

Digits	B1	Curves
25	50000	57 / 280

Estimated T-Level: 21.0 ⓘ

TF below 2^65 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Richard C Wolber	4733180AAC121203	0
Verified (Factored)	1999-08-07	Ethan Hansen	4733180AAC121203	3113700

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-05-02	XZT	29C52F60AEE0F696	1	1537357	5	3

History

Date	User	Type	Result
2022-02-20	Joss	NF-PM1	B1=1000000, B2=128282700
2021-05-02	ky0uraku	CERT	PRP Certification Proof certified good
2021-05-02	XZT	C-PRP	M3122879/15624461327532720888047 : 29C52F60AEE0F696 PRP proof power = 7 PRP: Verified Proof certified good
2021-05-01	daveward2005	F-ECM	Factor: 15624461327532720888047 / (ECM curve 7, B1=50000, B2=5000000, Sigma=5202697441423263)
2019-01-14	TJAOI	NF	no factor from 2^67 to 2^68
2018-11-25	mikr	NF-PM1	B1=3000000, B2=100000000, E=12
2018-07-17	Joss	NF-PM1	B1=692144, B2=3460720
2018-07-17	Joss	NF-PM1	B1=692144, B2=2768576
2018-07-16	Joss	NF-PM1	B1=692144, B2=2076432
2017-04-14	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-09-30	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	Grant McCracken	NF	no factor from 2^61 to 2^62
2011-08-28	Squeeky_Squirrel	NF-PM1	B1=105000, B2=2126250, E=6
2009-07-03	Carsten Kossendey	NF-PM1	B1=15000, B2=180000
2009-04-11	S485122	NF	no factor from 2^60 to 2^61