1 607 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 3 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
28927	5	14.8	old
863438869209296207	18	59.6	old
14950998663475271751814476834378599253816793	44	143.4	old

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	161689 / 194238

Estimated T-Level: 64.2 ⓘ

TF below 2^208 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-21	Oliver Kruse	C29E83C44D7F3D5B	3	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	C29E83C44D7F3D5B	3	0	1	3
Verified	2017-12-07	ATH	C29E83C44D7F3D5B	3	572	1	3
Verified	2020-04-17	Oliver Kruse	6EBEA6D511990E60	3	123	5	3
Verified	2020-08-12	_p95holder_	6EBEA6D511990E60	3	674	5	3

History

Date	User	Type	Result
2024-03-01	masser	NF-PM1	B1=250000000000, B2=501952956224199480
2022-01-26	Ethan O'Connor	NF-PM1	B1=10000000000, B2=200519301405182760
2021-07-22	ViliamF	NF-PP1	Start=2/7, B1=1000000000, B2=221000000000
2020-08-12	_p95holder_	C-PRP	M1607/28927/863438869209296207/14950998663475271751814476834378599253816793 : 6EBEA6D511990E60 PRP: Verified PRP without proof (small exponent)
2020-04-17	Oliver Kruse	C-PRP	M1607/28927/863438869209296207/14950998663475271751814476834378599253816793 : 6EBEA6D511990E60 PRP: Verified PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M1607/28927/863438869209296207/14950998663475271751814476834378599253816793 : C29E83C44D7F3D5B PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M1607/28927/863438869209296207/14950998663475271751814476834378599253816793 : C29E83C44D7F3D5B PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M1607/known_factors : C29E83C44D7F3D5B PRP without proof (not generated)
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=1000000000, B2=100000000000, E=12