408 637 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
6948127925745726471366647	25	82.5	2009-09-03 15:22:55

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	200 / 640

Estimated T-Level: 26.6 ⓘ

TF below 2^83 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	2327	0
Verified (Factored)		Andrew Clayman	2A1B03504A486327	0
Verified (Factored)		Eivind Triel	2A1B03504A486327	332515
Verified (Factored)	2002-02-10	Dennis Pope	2A1B03504A486327	17451

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-23	Oliver Kruse	33EF00949C4A9DE7	1	0	1	3
Verified	2017-11-02	kkmrkkblmbrbk	33EF00949C4A9DE7	1	66227	1	3
Unverified (Reliable)	2020-04-18	Oliver Kruse	D29425CB9CDB31__	1	117120	5	3

History

Date	User	Type	Result
2020-04-18	Oliver Kruse	C-PRP	M408637/6948127925745726471366647 : D29425CB9CDB31__ PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-11-02	kkmrkkblmbrbk	C-PRP	M408637/6948127925745726471366647 : 33EF00949C4A9DE7 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-09-23	Oliver Kruse	C-PRP	M408637/6948127925745726471366647 : 33EF00949C4A9DE7 PRP: Unverified (Reliable) PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=3000000, B2=100000000, E=12
2009-09-03	Ryan Schulz	F-ECM	Factor: 6948127925745726471366647
2008-11-19	markr	NF-PM1	B1=1000000, B2=30000000, E=12