fond of a factor? Urn yourself to become remains

[petrw1]

re: Post 1831

Originally Posted by James Heinrich

You do (manual results form was changed several months ago to detect and handle this).

Seems it doesn't:

Manual testing	28722943	F	2021-04-02 22:40	0.0	Factor: 4578986428371835478041 / TF: 71-72	15.9100
Manual testing	28723249	F	2021-04-02 22:40	0.0	Factor: 3416851867143956961289 / TF: 71-72	8.8773
Manual testing	28725779	F	2021-04-02 22:40	0.0	Factor: 3325594725067066329023 / TF: 71-72	8.2263
Manual testing	28721831	NF	2021-04-02 22:40	0.0	no factor from 2^71 to 2^72	16.6513

[James Heinrich]

Originally Posted by petrw1

Seems it doesn't

Sorry, you're right. The change I was thinking of relates to detecting whether the result claims to be full-range TF or not, and some related code that handles composite factors found by TF, but the actual PrimeNet code that calculates and applies credit is outside my zone-of-control, and does not currently have any mechanism for specifying whether a range was complete or not. The data is available to the manual results form, it just can't pass that information on to where the credit is calculated and applied. Such a change would need to be applied at the George level.

[firejuggler]

M27151489 has a 76.836-bit (24-digit) factor: 134831419346216729059463 (P-1,B1=1350000,B2=109350000)

low bit but k= 7 × 11 × 349 337 × 92 306 471 , really close to my B2 bound

[petrw1]

https://www.mersenne.org/report_expo...8190299&full=1


Factor: 4299246979573209796361 / TF: 71-72
Factor: 4001656651216207394857 / TF: 71-72

0.1 bits apart

[firejuggler]

Found a new record for me

M27155813 has a 112.563-bit (34-digit) factor: 7669084564727955238545079945517857 (P-1,B1=1350000,B2=109350000)

[Jwb52z]

P-1 found a factor in stage #2, B1=746000, B2=20430000.
UID: Jwb52z/Clay, M103478927 has a factor: 118012953390073941784591 (P-1, B1=746000, B2=20430000).

76.643 bits.

[gLauss]

Finally, after hundreds of attempts (and thousands of curves) found my first factor with ECM Even if it is only 71bits, it shows that it is possible! 3255283

[masser]

Originally Posted by gLauss

Finally, after hundreds of attempts (and thousands of curves) found my first factor with ECM Even if it is only 71bits, it shows that it is possible! 3255283

Congrats! Nice find - may it be the first of many!

[James Heinrich]

Ryan strikes again. #11 on the all time biggest Mersenne factors list.

M4283 has a 219.268-bit (67-digit) factor: 1014581894481062086635266411284139009925301539055947709872564246847 (ECM,B1=260000000,B2=3142865025316,Sigma=6655636513802850625)

[petrw1]

Originally Posted by LaurV

Congrats, triple 59, next one you will find will start with a quadruple 69...

Factor ends with ... let's see 1, 2, 3: 69.
Exponent ends with 369; and starts with 396.
Exponent has 5 out of 8 digits 6 or 9: 40%
Factor has 9 out of 23 digits 6 or 9: 39%.
Time found contains a 6 and a 9.

39626369	F-PM1	2021-04-16 06:19	Factor: 35172309356636629912369

[Viliam Furik]

Originally Posted by petrw1

Factor ends with ... let's see 1, 2, 3: 69.
Exponent ends with 369; and starts with 396.
Exponent has 5 out of 8 digits 6 or 9: 40%
Factor has 9 out of 23 digits 6 or 9: 39%.
Time found contains a 6 and a 9.

39626369	F-PM1	2021-04-16 06:19	Factor: 35172309356636629912369

I'm pretty sure that's supposed to be 62.5%