3 446 789 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
1496504320252172969993	22	70.3	2021-05-15 14:34:12

ECM

Digits	B1	Curves
25	50000	19 / 280

Estimated T-Level: 20.3 ⓘ

TF below 2^63 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		John Lloyd	126B3FCF69B8C2DB	0
Verified (Factored)	1999-10-21	David Headland	126B3FCF69B8C2DB	1746819

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-05-16	tottenhoff	2B556A2F99E76EA9	1	2682961	5	3

History

Date	User	Type	Result
2023-04-18	Kevin_9611	NF-PM1	B1=600000, B2=577532340
2022-01-19	Joss	NF	no factor from 2^67 to 2^68
2021-05-18	Scott Hemphill	CERT	PRP Certification Proof certified good
2021-05-16	tottenhoff	C-PRP	M3446789/1496504320252172969993 : 2B556A2F99E76EA9 PRP proof power = 7 PRP: Verified Proof certified good
2021-05-15	kutens	F-ECM	Factor: 1496504320252172969993 / (ECM curve 4, B1=50000, B2=6700000, Sigma=9043381615564440)
2021-01-04	axn	NF	no factor from 2^68 to 2^69
2018-07-23	TJAOI	NF	no factor from 2^67 to 2^68
2017-02-08	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-04-16	Gordon Spence	NF	no factor from 2^65 to 2^66
2015-02-07	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-07	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-19	HBendtz	NF-PM1	B1=500000, B2=10000000, E=12
2014-07-18	Joss	NF-PM1	B1=78621
2012-08-18	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-11-04	USAFSS	NF-PM1	B1=60000, B2=945000, E=6
2011-08-04	markr	NF	no factor to 2^62
2009-08-15	Carsten Kossendey	NF-PM1	B1=15000, B2=210000
2009-03-22	S485122	NF	no factor from 2^60 to 2^61