2 420 567 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
17447446937	11	34.0	old
158872604715578459399	21	67.1	2018-07-18 19:09:56

ECM

Digits	B1	Curves
25	50000	67 / 280

Estimated T-Level: 21.2 ⓘ

TF below 2^65 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-13	Oliver Kruse	E1482B0AACFE3D85	1	1755672	5	3
Verified (Factored)	2017-11-27	kkmrkkblmbrbk	E1482B0AACFE3D85	1	919972	5	3
Verified	2018-07-20	_p95holder_	E1482B0AACFE3D85	2	2406095	5	3

P-1 factors

Date	Factor	B1	B2
2018-07-18	158872604715578459399	2000000	60000000

History

Date	User	Type	Result
2018-07-20	_p95holder_	C-PRP	M2420567/17447446937/158872604715578459399 : E1482B0AACFE3D85 PRP: Verified PRP without proof (not generated)
2018-07-18	alpertron	F-PM1	Factor: 158872604715578459399 / (P-1, B1=2000000, B2=60000000, E=12)
2017-11-27	kkmrkkblmbrbk	C-PRP	M2420567/17447446937 : E1482B0AACFE3D85 PRP: Verified PRP without proof (not generated)
2017-10-13	Oliver Kruse	C-PRP	M2420567/17447446937 : E1482B0AACFE3D85 PRP: Verified PRP without proof (not generated)