4 895 963 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
114586214747713	15	46.7	old
66142127115503167	17	55.9	2015-02-20 12:15:53
26861047308312414340151	23	74.5	2019-07-29 09:43:28

ECM

Digits	B1	Curves
25	50000	3 / 280

Estimated T-Level: 20.1 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-20	kkmrkkblmbrbk	FBDB23F84E39E8CA	2	0	1	3
Verified (Factored)	2018-04-06	Oliver Kruse	FBDB23F84E39E8CA	2	4125510	1	3
Verified	2019-07-30	oodaira	A8B2F937D43DE139	3	1426146	5	3
Verified	2019-07-31	kkmrkkblmbrbk	A8B2F937D43DE139	3	441128	5	3

History

Date	User	Type	Result
2023-09-12	USAFSS	NF-PM1	B1=256000, B2=105522060
2019-07-31	kkmrkkblmbrbk	C-PRP	M4895963/114586214747713/66142127115503167/26861047308312414340151 : A8B2F937D43DE139 PRP: Verified PRP without proof (not generated)
2019-07-30	oodaira	C-PRP	M4895963/114586214747713/66142127115503167/26861047308312414340151 : A8B2F937D43DE139 PRP: Verified PRP without proof (not generated)
2019-07-29	_p95holder_	F-ECM	Factor: 26861047308312414340151 / (ECM curve 3, B1=50000, B2=5000000)
2018-04-06	Oliver Kruse	C-PRP	M4895963/114586214747713/66142127115503167 : FBDB23F84E39E8CA PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4895963/114586214747713/66142127115503167 : FBDB23F84E39E8CA PRP: Verified PRP without proof (not generated)
2015-02-20	TJAOI	F	Factor: 66142127115503167 / TF: 55-56