154 387 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
102821743	9	26.6	old
64289747873199728154416727199	29	95.7	2018-10-12 08:22:55

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	176 / 1566

Estimated T-Level: 30.6 ⓘ

TF below 2^97 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-22	Oliver Kruse	D28A24F8D5D2F7D2	1	0	1	3
Verified (Factored)	2017-10-11	kkmrkkblmbrbk	D28A24F8D5D2F7D2	1	86727	1	3
Verified	2018-10-14	Oliver Kruse	2D30A81543739AE9	2	16040	5	3
Verified	2018-10-15	pew	2D30A81543739AE9	2	96447	5	3

History

Date	User	Type	Result
2018-10-15	pew	C-PRP	M154387/102821743/64289747873199728154416727199 : 2D30A81543739AE9 PRP: Verified PRP without proof (small exponent)
2018-10-14	Oliver Kruse	C-PRP	M154387/102821743/64289747873199728154416727199 : 2D30A81543739AE9 PRP: Verified PRP without proof (small exponent)
2018-10-12	Niels_Mache_Nextcloud	F-ECM	Factor: 64289747873199728154416727199 / (ECM curve 1, B1=250000, B2=25000000)
2017-10-11	kkmrkkblmbrbk	C-PRP	M154387/102821743 : D28A24F8D5D2F7D2 PRP: Verified PRP without proof (small exponent)
2017-09-22	Oliver Kruse	C-PRP	M154387/102821743 : D28A24F8D5D2F7D2 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M154387/102821743 : D28A24F8D5D2F7D2 PRP without proof (not generated)
2016-12-02	kkmrkkblmbrbk	NF-PM1	B1=100000000, B2=2000000000, E=12