2 626 817 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
4169753570389684909059577	25	81.8	2017-10-28 02:51:17

ECM

Digits	B1	Curves
25	50000	27 / 280

Estimated T-Level: 20.5 ⓘ

TF below 2^63 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Chris Wisen	1487BE537B22BFD4	0
Verified (Factored)	1999-04-02	Sean Matheis	1487BE537B22BFD4	1526404

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-28	Oliver Kruse	63347C3A983F09AB	1	1249447	5	3
Verified	2017-12-02	kkmrkkblmbrbk	63347C3A983F09AB	1	728253	5	3

History

Date	User	Type	Result
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-12-02	kkmrkkblmbrbk	C-PRP	M2626817/4169753570389684909059577 : 63347C3A983F09AB PRP: Verified PRP without proof (not generated)
2017-10-28	Oliver Kruse	C-PRP	M2626817/4169753570389684909059577 : 63347C3A983F09AB PRP: Verified PRP without proof (not generated)
2017-10-28	Chang Chia-Tche	F-ECM	Factor: 4169753570389684909059577 / (ECM curve 3, B1=50000, B2=5000000)
2017-09-01	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2016-01-18	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-23	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-23	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-12	markr	NF	no factor from 2^61 to 2^62
2011-02-27	James Heinrich	NF-PM1	B1=300000, B2=8000000, E=12
2011-01-19	Joss	NF-PM1	B1=50000
2010-12-26	Joss	NF-PM1	B1=30000
2010-12-21	Joss	NF-PM1	B1=20000
2009-02-13	Sturle Sunde	NF	no factor from 2^60 to 2^61