1 648 391 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
13187129	8	23.7	old
2546528902572121	16	51.2	2014-06-19 11:33:36
194617156230105572578423	24	77.4	2015-05-18 12:45:52

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 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	Number of known factors	Shift	Type	Base
Verified	2017-10-04	kkmrkkblmbrbk	E1917F5FA66580C6	3	0	1	3
Verified	2017-11-14	ATH	E1917F5FA66580C6	3	1610177	1	3

P-1 factors

Date	Factor	B1	B2
2015-05-18	194617156230105572578423	500000	15000000

History

Date	User	Type	Result
2017-11-14	ATH	C-PRP	M1648391/13187129/2546528902572121/194617156230105572578423 : E1917F5FA66580C6 PRP: Verified PRP without proof (not generated)
2017-10-04	kkmrkkblmbrbk	C-PRP	M1648391/13187129/2546528902572121/194617156230105572578423 : E1917F5FA66580C6 PRP: Verified PRP without proof (not generated)
2017-10-02	Oliver Kruse	C-PRP	M1648391/13187129/2546528902572121/194617156230105572578423 : E1917F5FA66580C6 PRP without proof (not generated)
2015-05-18	alpertron	F-PM1	Factor: 194617156230105572578423 / (P-1, B1=500000, B2=15000000, E=12)
2014-06-19	TJAOI	F	Factor: 2546528902572121