3 445 643 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
1890553429784423153435939023	28	90.6	2021-07-19 19:23:21

ECM

Digits	B1	Curves
25	50000	36 / 280

Estimated T-Level: 20.6 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		John Lloyd	445EC75AB93FF39C	0
Verified (Factored)	1999-07-12	Toby Long-Leather	445EC75AB93FF39C	294869

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-07-19	SRJ2877	6C25947049AB06CC	1	1924788	5	3

P-1 factors

Date	Factor	B1	B2
2021-07-19	1890553429784423153435939023	5000000	200000000

History

Date	User	Type	Result
2022-04-10	Joss	NF-PM1	B1=1000000, B2=126668850
2021-07-19	James Heinrich	CERT	PRP Certification Proof certified good
2021-07-19	SRJ2877	C-PRP	M3445643/1890553429784423153435939023 : 6C25947049AB06CC PRP proof power = 7 PRP: Verified Proof certified good
2021-07-19	mikr	F-PM1	Factor: 1890553429784423153435939023 / (P-1, B1=5000000, B2=200000000, E=12)
2021-06-09	Numberwang	NF-PM1	B1=1000000, B2=30000000
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
2017-02-06	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=78628
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
2011-08-05	markr	NF	no factor to 2^62
2009-07-06	Carsten Kossendey	NF-PM1	B1=15000, B2=210000
2009-03-22	S485122	NF	no factor from 2^60 to 2^61