1 535 581 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
1338862940149762807799	22	70.2	2009-04-17 15:14:23

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	105 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Les	1974360A2D9AF637	0
Verified (Factored)	1998-10-25	Ethan Hansen	1974360A2D9AF637	1427462

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-01	Oliver Kruse	B258DC9A03F99711	1	0	1	3
Verified	2017-10-30	kkmrkkblmbrbk	B258DC9A03F99711	1	910153	1	3

History

Date	User	Type	Result
2017-10-30	kkmrkkblmbrbk	C-PRP	M1535581/1338862940149762807799 : B258DC9A03F99711 PRP: Verified PRP without proof (not generated)
2017-10-01	Oliver Kruse	C-PRP	M1535581/1338862940149762807799 : B258DC9A03F99711 PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2009-04-17	KAMCOBILL	F-ECM	Factor: 1338862940149762807799