1 381 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 5 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
8287	4	13.0	old
462853283623	12	38.8	old
20314602484365657521	20	64.1	old
324347780588879609356756802551	30	98.0	old
5717943157553181705211179112739301167905781641204356084154399	61	201.8	2020-10-22 23:48:27

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	73339 / 105362

Estimated T-Level: 58.5 ⓘ

TF below 2^189 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-27	Oliver Kruse	5F12ECA192013581	4	0	1	3
Verified (Factored)	2017-10-09	Chang Chia-Tche	5F12ECA192013581	4	0	1	3
Verified (Factored)	2017-10-12	kkmrkkblmbrbk	5F12ECA192013581	4	646	1	3
Verified (Factored)	2020-04-17	Oliver Kruse	8B47394C9B3C899A	4	560	5	3
Verified (Factored)	2020-08-12	_p95holder_	8B47394C9B3C899A	4	648	5	3
Verified	2020-10-23	James Heinrich	8B47394C9B3C899A	5	408	5	3
Verified	2020-10-23	ANONYMOUS	8B47394C9B3C899A	5	1078	5	3
Verified	2020-10-26	Klaus Nordmann	8B47394C9B3C899A	5	1111	5	3

History

Date	User	Type	Result
2021-07-20	ViliamF	NF-PP1	Start=2/7, B1=1000000000, B2=221000000000
2021-03-27	nordi	NF-PM1	B1=1000000000000, B2=2232843418649129478
2020-10-26	Klaus Nordmann	C-PRP	M1381/8287/462853283623/20314602484365657521/324347780588879609356756802551/5717943157553181705211179112739301167905781641204356084154399 : 8B47394C9B3C899A PRP: Verified PRP without proof (small exponent)
2020-10-23	ANONYMOUS	C-PRP	M1381/8287/462853283623/20314602484365657521/324347780588879609356756802551/5717943157553181705211179112739301167905781641204356084154399 : 8B47394C9B3C899A PRP: Verified PRP without proof (small exponent)
2020-10-23	James Heinrich	C-PRP	M1381/8287/462853283623/20314602484365657521/324347780588879609356756802551/5717943157553181705211179112739301167905781641204356084154399 : 8B47394C9B3C899A PRP: Verified PRP without proof (small exponent)
2020-10-22	Ryan Propper	F-ECM	Factor: 5717943157553181705211179112739301167905781641204356084154399 / (ECM curve 1, B1=850000000, B2=15892628251516, Sigma=15369383506190878879)
2020-08-12	_p95holder_	C-PRP	M1381/8287/462853283623/20314602484365657521/324347780588879609356756802551 : 8B47394C9B3C899A PRP: Verified PRP without proof (small exponent)
2020-04-17	Oliver Kruse	C-PRP	M1381/8287/462853283623/20314602484365657521/324347780588879609356756802551 : 8B47394C9B3C899A PRP: Verified PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M1381/8287/462853283623/20314602484365657521/324347780588879609356756802551 : 5F12ECA192013581 PRP: Verified PRP without proof (not generated)
2017-10-09	Chang Chia-Tche	C-PRP	M1381/known_factors : 5F12ECA192013581 PRP: Verified PRP without proof (not generated)
2017-09-27	Oliver Kruse	C-PRP	M1381/8287/462853283623/20314602484365657521/324347780588879609356756802551 : 5F12ECA192013581 PRP: Verified PRP without proof (not generated)
2017-09-25	csaba	C-PRP	M1381/known_factors : 5F12ECA192013581 PRP without proof (not generated)
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=1000000000, B2=100000000000, E=12