2 068 453 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
53560521983	11	35.6	old
2072376226096912871	19	60.8	2016-01-15 21:39:05
56760643016565318032729	23	75.6	2021-11-29 03:30:06

ECM

Digits	B1	Curves
25	50000	111 / 280

Estimated T-Level: 22.0 ⓘ

TF below 2^68 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	17ABCD98FAC164B1	2	0	1	3
Verified (Factored)	2017-10-21	Oliver Kruse	17ABCD98FAC164B1	2	374043	1	3
Verified	2021-12-01	_p95holder_	58293B7C15C0226F	3	1142212	5	3
Verified	2021-12-05	LaurV	58293B7C15C0226F	3	1412233	5	3

P-1 factors

Date	Factor	B1	B2
2016-01-15	2072376226096912871	500000	15000000

History

Date	User	Type	Result
2021-12-05	Derek	CERT	PRP Certification Proof certified good
2021-12-05	LaurV	C-PRP	M2068453/53560521983/2072376226096912871/56760643016565318032729 : 58293B7C15C0226F PRP proof power = 7 PRP: Verified Proof certified good
2021-12-01	_p95holder_	C-PRP	M2068453/53560521983/2072376226096912871/56760643016565318032729 : 58293B7C15C0226F PRP: Verified PRP without proof (not generated)
2021-11-29	_p95holder_	F-ECM	Factor: 56760643016565318032729 / (ECM curve 5, B1=50000, B2=5000000)
2017-10-21	Oliver Kruse	C-PRP	M2068453/53560521983/2072376226096912871 : 17ABCD98FAC164B1 PRP: Verified PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M2068453/2072376226096912871/53560521983 : 17ABCD98FAC164B1 PRP: Verified PRP without proof (not generated)
2016-01-15	alpertron	F-PM1	Factor: 2072376226096912871 / (P-1, B1=500000, B2=15000000, E=12)