2 248 583 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
2385858517482511152091207	25	81.0	2020-11-23 14:50:16

ECM

Digits	B1	Curves
25	50000	124 / 280

Estimated T-Level: 22.2 ⓘ

TF below 2^69 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		John Borleis III	78AE2C288DB8B8F3	0
Verified (Factored)	1999-05-16	Ronald Van Iwaarden	78AE2C288DB8B8F3	1205643
Verified (Factored)	2018-04-22	kkmrkkblmbrbk	78AE2C288DB8B8F3	1880202

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-11-23	mrh	E87A97EFD720FD33	1	1137497	5	3

History

Date	User	Type	Result
2020-11-23	takahashi	CERT	PRP Certification Proof certified good
2020-11-23	mrh	C-PRP	M2248583/2385858517482511152091207 : E87A97EFD720FD33 PRP proof power = 7 PRP: Verified Proof certified good
2020-11-23	Keysarecool	F-ECM	Factor: 2385858517482511152091207 / (ECM curve 7, B1=50000, B2=5000000, Sigma=3183046521532201)
2019-03-25	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-22	kkmrkkblmbrbk	C-LL	78AE2C288DB8B8F3
2017-01-13	Conductor	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-12-06	Alexander Dubrovin	NF-PM1	B1=1000000, B2=20000000, E=12
2015-10-27	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
2014-10-03	Joss	NF-PM1	B1=142088
2014-06-01	Joss	NF-PM1	B1=113544
2013-12-04	LaurV	NF	no factor from 2^62 to 2^63
2012-05-04	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-14	Oscar Östlin	NF-PM1	B1=85000, B2=1636250, E=6
2010-11-11	Oscar Östlin	NF-PM1	B1=75011
2010-11-06	Joss	NF-PM1	B1=15000
2009-01-10	Sturle Sunde	NF	no factor from 2^60 to 2^61