1 872 547 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
2041720011658601	16	50.9	old
72192306169165386119	20	66.0	2018-04-15 13:38:33
511812748135906161169817	24	78.8	2015-08-17 12:52:35

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 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	8F3EFB95D22A92B4	2	0	1	3
Verified (Factored)	2017-10-20	Oliver Kruse	8F3EFB95D22A92B4	2	839984	1	3
Verified	2018-04-17	Oliver Kruse	368DCFC82BFFC652	3	82965	5	3
Verified	2018-04-19	Battlemaxx	368DCFC82BFFC652	3	1099418	5	3

P-1 factors

Date	Factor	B1	B2
2015-08-17	511812748135906161169817	500000	15000000

History

Date	User	Type	Result
2018-04-19	Battlemaxx	C-PRP	M1872547/2041720011658601/511812748135906161169817/72192306169165386119 : 368DCFC82BFFC652 PRP: Verified PRP without proof (not generated)
2018-04-17	Oliver Kruse	C-PRP	M1872547/2041720011658601/511812748135906161169817/72192306169165386119 : 368DCFC82BFFC652 PRP: Verified PRP without proof (not generated)
2018-04-15	Chang Chia-Tche	F-ECM	Factor: 72192306169165386119 / (ECM curve 1, B1=50000, B2=5000000)
2017-10-20	Oliver Kruse	C-PRP	M1872547/2041720011658601/511812748135906161169817 : 8F3EFB95D22A92B4 PRP: Verified PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M1872547/2041720011658601/511812748135906161169817 : 8F3EFB95D22A92B4 PRP: Verified PRP without proof (not generated)
2015-08-17	alpertron	F-PM1	Factor: 511812748135906161169817 / (P-1, B1=500000, B2=15000000, E=12)