2 785 339 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
4151935107850031521	19	61.8	2009-03-21 17:07:45

ECM

Digits	B1	Curves
25	50000	4 / 280

Estimated T-Level: 20.1 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Francois E Jaccard	0FA873F5FD157F01	0
Verified (Factored)	1999-07-27	Joe Kaufman	0FA873F5FD157F01	1837800

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-21	Oliver Kruse	975515AAFE9692D6	1	626217	5	3
Verified	2017-12-06	kkmrkkblmbrbk	975515AAFE9692D6	1	1398466	5	3

History

Date	User	Type	Result
2023-01-27	USAFSS	NF-PM1	B1=288000, B2=226423890
2017-12-06	kkmrkkblmbrbk	C-PRP	M2785339/4151935107850031521 : 975515AAFE9692D6 PRP: Verified PRP without proof (not generated)
2017-10-21	Oliver Kruse	C-PRP	M2785339/4151935107850031521 : 975515AAFE9692D6 PRP: Verified PRP without proof (not generated)
2009-03-21	Lukasz Wrobel	F-ECM	Factor: 4151935107850031521
2009-02-01	Sturle Sunde	NF	no factor from 2^60 to 2^61