2 861 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
7715659241	10	32.8	old
205168992070678304332117169090140498848233257	45	147.2	2018-05-11 08:55:30
2639542785491732816079246214946103681341886539303	49	160.9	2020-01-16 21:50:33

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	2925 / 16550

Estimated T-Level: 45.9 ⓘ

TF below 2^147 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-21	Oliver Kruse	52A379C913FD2F0E	1	0	1	3
Verified (Factored)	2017-10-12	kkmrkkblmbrbk	52A379C913FD2F0E	1	1247	1	3
Verified (Factored)	2018-05-15	marcomich	A4F131B5663D152A	2	1032	5	3
Verified (Factored)	2018-05-16	Battlemaxx	A4F131B5663D152A	2	889	5	3
Verified	2020-01-16	nordi	A4F131B5663D152A	3	932	5	3
Verified	2020-01-17	mrh	A4F131B5663D152A	3	765	5	3
Verified	2020-04-17	Oliver Kruse	A4F131B5663D152A	3	2536	5	3

History

Date	User	Type	Result
2021-07-07	ViliamF	NF-PM1	B1=1000000000, B2=191000000000
2020-04-17	Oliver Kruse	C-PRP	M2861/7715659241/205168992070678304332117169090140498848233257/2639542785491732816079246214946103681341886539303 : A4F131B5663D152A PRP: Verified PRP without proof (small exponent)
2020-01-17	mrh	C-PRP	M2861/7715659241/205168992070678304332117169090140498848233257/2639542785491732816079246214946103681341886539303 : A4F131B5663D152A PRP: Verified PRP without proof (small exponent)
2020-01-16	nordi	C-PRP	M2861/7715659241/205168992070678304332117169090140498848233257/2639542785491732816079246214946103681341886539303 : A4F131B5663D152A PRP: Verified PRP without proof (small exponent)
2020-01-16	Ryan Propper	F-ECM	Factor: 2639542785491732816079246214946103681341886539303 / (ECM curve 1, B1=260000000)
2018-05-16	Battlemaxx	C-PRP	M2861/7715659241/205168992070678304332117169090140498848233257 : A4F131B5663D152A PRP: Verified PRP without proof (small exponent)
2018-05-15	marcomich	C-PRP	M2861/7715659241/205168992070678304332117169090140498848233257 : A4F131B5663D152A PRP: Verified PRP without proof (small exponent)
2018-05-11	James Hintz	F-ECM	Factor: 205168992070678304332117169090140498848233257 / (ECM curve 1300, B1=11000000, B2=1100000000)
2017-10-12	kkmrkkblmbrbk	C-PRP	M2861/7715659241 : 52A379C913FD2F0E PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M2861/7715659241 : 52A379C913FD2F0E PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M2861/7715659241 : 52A379C913FD2F0E PRP without proof (not generated)