1 827 757 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
272088801066520909543	21	67.9	2009-07-16 21:07:37
6415740473308631351543	22	72.4	2015-08-23 16:10:04

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 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)		Roy Harris	AC3F02B2ACDB144C	0
Verified (Factored)	1998-12-27	Phillip Stoke	AC3F02B2ACDB144C	1061107

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-30	alpertron	68FD34F4A08EDC9E	2	0	1	3
Verified	2017-10-19	Oliver Kruse	68FD34F4A08EDC9E	2	1088087	1	3

P-1 factors

Date	Factor	B1	B2
2015-08-23	6415740473308631351543	500000	15000000

History

Date	User	Type	Result
2017-10-19	Oliver Kruse	C-PRP	M1827757/272088801066520909543/6415740473308631351543 : 68FD34F4A08EDC9E PRP: Verified PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M1827757/272088801066520909543/6415740473308631351543 : 68FD34F4A08EDC9E PRP: Verified PRP without proof (not generated)
2015-08-23	alpertron	F-PM1	Factor: 6415740473308631351543 / (P-1, B1=500000, B2=15000000, E=12)
2009-07-16	James Hintz	F-ECM	Factor: 272088801066520909543