2 390 023 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
20757775200562606259663	23	74.1	2020-10-05 12:14:43

ECM

Digits	B1	Curves
25	50000	89 / 280

Estimated T-Level: 21.6 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1997-12-13	Herb Savage	5B40EC04EC7180ED	0
Verified (Factored)	1999-06-06	Markus Schauler	5B40EC04EC7180ED	772867
Verified (Factored)	2018-05-16	kkmrkkblmbrbk	5B40EC04EC7180ED	1076392

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-10-05	Xyzzy	DBC840098B6141C0	1	1090502	5	3

History

Date	User	Type	Result
2020-10-05	Ben Delo	CERT	PRP Certification Proof certified good
2020-10-05	Xyzzy	C-PRP	M2390023/20757775200562606259663 : DBC840098B6141C0 PRP proof power = 7 PRP: Verified Proof certified good
2020-10-05	MarkS	F-ECM	Factor: 20757775200562606259663 / (ECM curve 3, B1=50000, B2=5000000, Sigma=4532953848592035)
2019-03-11	TJAOI	NF	no factor from 2^67 to 2^68
2018-05-16	kkmrkkblmbrbk	C-LL	5B40EC04EC7180ED
2017-06-23	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
2015-11-21	mikr	NF-PM1	B1=3000000, B2=100000000, E=12
2015-11-02	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-10	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-10	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-15	-Anonymous-	NF-PM1	B1=126855
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-01	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2010-12-25	markr	NF-PM1	B1=100000, B2=2075000, E=6
2010-11-15	Joss	NF-PM1	B1=20000
2010-11-08	Joss	NF-PM1	B1=15000
2009-01-15	Sturle Sunde	NF	no factor from 2^60 to 2^61