2 567 353 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
15976739057073284856551	23	73.8	2020-08-02 21:12:42

ECM

Digits	B1	Curves
25	50000	53 / 280

Estimated T-Level: 20.9 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		Bjorn Skog	C0AD474A8C29C42A	0
Verified (Factored)	1999-04-13	Brian Doherty	C0AD474A8C29C42A	20277
Verified (Factored)	2018-06-16	kkmrkkblmbrbk	C0AD474A8C29C42A	2515079

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-08-03	Alexander Pavlicin	E91171D375D6B60F	1	2291962	5	3
Verified	2020-08-04	marssystems	E91171D375D6B60F	1	442397	5	3

History

Date	User	Type	Result
2020-08-04	marssystems	C-PRP	M2567353/15976739057073284856551 : E91171D375D6B60F PRP: Verified PRP without proof (not generated)
2020-08-03	Alexander Pavlicin	C-PRP	M2567353/15976739057073284856551 : E91171D375D6B60F PRP: Verified PRP without proof (not generated)
2020-08-02	GAN	F-ECM	Factor: 15976739057073284856551 / (ECM curve 2, B1=50000, B2=5000000, Sigma=2623998000058929)
2019-05-27	TJAOI	NF	no factor from 2^67 to 2^68
2018-06-16	kkmrkkblmbrbk	C-LL	C0AD474A8C29C42A
2017-08-13	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-05-26	mikr	NF-PM1	B1=3200000, B2=112000000, E=12
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2015-11-08	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
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-17	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-04-15	James Heinrich	NF-PM1	B1=175000, B2=4112500, E=6
2011-01-10	Joss	NF-PM1	B1=50000
2011-01-03	Joss	NF-PM1	B1=30000
2010-12-21	Joss	NF-PM1	B1=20000
2009-01-27	Sturle Sunde	NF	no factor from 2^60 to 2^61