1 915 007 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
84697183499118103	17	56.2	old
27768509757071341992863	23	74.6	2021-10-26 02:24:43

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	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-30	alpertron	64CF26B15995E107	1	0	1	3
Verified (Factored)	2017-10-20	Oliver Kruse	64CF26B15995E107	1	1521594	1	3
Verified	2021-10-26	MarkS	4C5A18D9EEAB6DFE	2	551345	5	3

History

Date	User	Type	Result
2021-10-26	lquenti	CERT	PRP Certification Proof certified good
2021-10-26	MarkS	C-PRP	M1915007/84697183499118103/27768509757071341992863 : 4C5A18D9EEAB6DFE PRP proof power = 7 PRP: Verified Proof certified good
2021-10-26	MarkS	F-ECM	Factor: 27768509757071341992863 / (ECM curve 1, B1=50000, B2=5000000, Sigma=7613184926042272)
2017-10-20	Oliver Kruse	C-PRP	M1915007/84697183499118103 : 64CF26B15995E107 PRP: Verified (Factored) PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M1915007/84697183499118103 : 64CF26B15995E107 PRP: Verified (Factored) PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12