2 371 673 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

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

Factored

Factor	Digits	Bits	Date
508856733075254170447	21	68.8	2016-05-16 14:56:34

ECM

Digits	B1	Curves
25	50000	195 / 280

Estimated T-Level: 23.5 ⓘ

TF below 2^73 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Peter Marksteiner	8E1B8D414CD81D71	0
Verified (Factored)	1999-03-26	Paul Shimmin	8E1B8D414CD81D71	156044

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-12	Oliver Kruse	A804A7ADFE91972B	1	1543708	5	3
Verified	2017-11-25	kkmrkkblmbrbk	A804A7ADFE91972B	1	786029	5	3

History

Date	User	Type	Result
2018-09-28	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-25	kkmrkkblmbrbk	C-PRP	M2371673/508856733075254170447 : A804A7ADFE91972B PRP: Verified PRP without proof (not generated)
2017-10-12	Oliver Kruse	C-PRP	M2371673/508856733075254170447 : A804A7ADFE91972B PRP: Verified PRP without proof (not generated)
2016-05-16	Jason U	F-ECM	Factor: 508856733075254170447 / (ECM curve 1, B1=50000, B2=5000000)
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2015-10-30	ramgeis	NF	no factor from 2^65 to 2^66
2015-09-30	mikr	NF-PM1	B1=3000000, B2=100000000, E=12
2015-03-09	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-09	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-10	Joss	NF-PM1	B1=127063
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-05-31	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2010-12-29	markr	NF-PM1	B1=100000, B2=2025000, E=6
2010-11-04	Joss	NF-PM1	B1=20000
2009-01-14	Sturle Sunde	NF	no factor from 2^60 to 2^61