2 618 813 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
1243930448583092842453103	25	80.0	2020-08-10 11:58:07

ECM

Digits	B1	Curves
25	50000	50 / 280

Estimated T-Level: 20.9 ⓘ

TF below 2^64 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Willmore	912BC4451C425847	0
Bad		David Willmore	A87DCF9B3947DBE0	0
Bad		nmainer	F829B7B17539D9F5	0
Verified (Factored)	1999-04-23	Matthias Müller	912BC4451C425847	71193
Verified (Factored)	2000-03-15	David Campeau	912BC4451C425847	1896934

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-08-10	M Miller	3EB15D5DB566D280	1	2519670	5	3

History

Date	User	Type	Result
2020-08-10	George Woltman	CERT	PRP Certification Proof certified good
2020-08-10	M Miller	C-PRP	M2618813/1243930448583092842453103 : 3EB15D5DB566D280 PRP proof power = 7 PRP: Verified Proof certified good
2020-08-10	GAN	F-ECM	Factor: 1243930448583092842453103 / (ECM curve 2, B1=50000, B2=5000000, Sigma=3666380191770445)
2019-10-14	masser	NF-PM1	B1=2618813, B2=26188130, E=12
2019-04-15	TJAOI	NF	no factor from 2^67 to 2^68
2017-07-20	Joss	NF-PM1	B1=400000, B2=4000000, E=6
2016-05-23	Joss	NF-PM1	B1=200000, B2=3600000, E=6
2016-03-16	Yxinity	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2016-01-17	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-18	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-18	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-13	Joss	NF-PM1	B1=124509
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-18	markr	NF	no factor from 2^61 to 2^62
2010-12-12	markr	NF-PM1	B1=100000, B2=2125000, E=6
2010-11-17	Joss	NF-PM1	B1=20000
2009-01-30	Sturle Sunde	NF	no factor from 2^60 to 2^61