2 671 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
2373524441444440625994123521138220202539745927415448738773239691983051831	73	240.4	2019-07-26 19:54:38

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	9201 / 9201
50	44000000	16550 / 16550
55	110000000	40830 / 40830
60	260000000	105362 / 105362
65	800000000	194238 / 194238
70	2400000000	121771 / 350860

Estimated T-Level: 66.7 ⓘ

TF below 2^217 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Unknown	0F6A	0
Verified (Factored)		George Woltman	8E7F476206810F6A	0
Verified (Factored)		Brian J. Beesley	8E7F476206810F6A	0
Verified (Factored)	2015-04-11	MadPoo	8E7F476206810F6A	1729

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-07-26	ATH	F6966C45A1D11FBE	1	1422	5	3
Verified	2019-07-27	oodaira	F6966C45A1D11FBE	1	2289	5	3
Verified	2020-04-17	Oliver Kruse	F6966C45A1D11FBE	1	1833	5	3

History

Date	User	Type	Result
2020-04-17	Oliver Kruse	C-PRP	M2671/2373524441444440625994123521138220202539745927415448738773239691983051831 : F6966C45A1D11FBE PRP: Verified PRP without proof (small exponent)
2019-07-27	oodaira	C-PRP	M2671/2373524441444440625994123521138220202539745927415448738773239691983051831 : F6966C45A1D11FBE PRP: Verified PRP without proof (small exponent)
2019-07-26	ATH	C-PRP	M2671/2373524441444440625994123521138220202539745927415448738773239691983051831 : F6966C45A1D11FBE PRP: Verified PRP without proof (small exponent)
2019-07-26	Ryan Propper	F-ECM	Factor: 2373524441444440625994123521138220202539745927415448738773239691983051831
2018-10-31	Joss	NF-PM1	B1=110000000000
2018-01-24	snme2pm1	NF	no factor from 2^63 to 2^64
2016-11-21	snme2pm1	NF	no factor from 2^62 to 2^63
2016-02-23	LaurV	NF	no factor from 2^57 to 2^58
2015-06-30	snme2pm1	NF	no factor from 2^61 to 2^62
2015-06-22	trebor	NF-PM1	B1=100000000000, B2=10000000000000, E=12
2015-04-11	MadPoo	C-LL	8E7F476206810F6A
2013-06-18	BloodIce	NF-PM1	B1=120000000000
2012-05-22	bcp19	NF	no factor from 2^60 to 2^61
2011-12-09	nextPrime	NF-PM1	B1=11000000000
2011-04-15	Joss	NF-PM1	B1=10000000000
2011-01-10	monst	NF	no factor from 2^58 to 2^60