2 178 073 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 2 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
7206661575894401	16	52.7	old
55405829841000525191	20	65.6	2018-01-14 06:36:01

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	164 / 640

Estimated T-Level: 26.3 ⓘ

TF below 2^82 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-10	kkmrkkblmbrbk	33419BB2A272F94D	1	0	1	3
Verified (Factored)	2017-10-23	Oliver Kruse	33419BB2A272F94D	1	2171757	1	3
Verified	2018-01-15	Yaroslav Berezhko	4A2236543770B3BE	2	1917661	5	3
Verified	2018-01-18	Oliver Kruse	4A2236543770B3BE	2	706535	5	3

History

Date	User	Type	Result
2018-01-18	Oliver Kruse	C-PRP	M2178073/7206661575894401/55405829841000525191 : 4A2236543770B3BE PRP: Verified PRP without proof (not generated)
2018-01-15	Yaroslav Berezhko	C-PRP	M2178073/7206661575894401/55405829841000525191 : 4A2236543770B3BE PRP: Verified PRP without proof (not generated)
2018-01-14	Adam Buran	F-ECM	Factor: 55405829841000525191 / (ECM curve 9, B1=50000, B2=5000000)
2017-10-23	Oliver Kruse	C-PRP	M2178073/7206661575894401 : 33419BB2A272F94D PRP: Verified PRP without proof (not generated)
2017-10-10	kkmrkkblmbrbk	C-PRP	M2178073/7206661575894401 : 33419BB2A272F94D PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12