Forum: Cloud Computing
2022-02-14, 06:53
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Replies: 12
Views: 1,220
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Forum: Cloud Computing
2022-02-12, 10:50
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Replies: 12
Views: 1,220
I talked to Linode and Kamatera and they both...
I talked to Linode and Kamatera and they both said that 100% utilization at all times is against their TOS for shared CPUs. Linode has dedicated CPUs that go for $240/mo ($0.36/h) for 16 cores/32GB....
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Forum: Cloud Computing
2022-02-12, 06:50
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Replies: 12
Views: 1,220
Ok, so Serverspace is too cheap too be true. I...
Ok, so Serverspace is too cheap too be true. I wonder under which circumstances it would make sense to use them. Why would someone book 16 vCPUs and then be ok with only being able to utilize them...
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Forum: Cloud Computing
2022-02-11, 16:37
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Replies: 12
Views: 1,220
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Forum: Information & Answers
2022-02-04, 17:12
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Replies: 11
Views: 1,225
Indeed interesting. But since Catalan only...
Indeed interesting. But since Catalan only conjectured that they are "prime up to a certain limit" the first five might well be the only ones. So it might seem more probable that it is composite?...
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Forum: Lone Mersenne Hunters
2022-02-04, 07:58
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Replies: 2,133
Views: 313,483
M22621 has a third factor:
...
M22621 has a third factor:
140986430775391680242875594970278954759 (https://www.mersenne.ca/factor/140986430775391680242875594970278954759) (39 digits, 126.7 bits)
ECM, B1=3M, B2=321M,...
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Forum: Homework Help
2022-01-31, 18:35
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Replies: 29
Views: 8,298
And another one:
An exercise deals with...
And another one:
An exercise deals with an integer a having order 3 mod p. And it is to be shown that a+1 has order 6 mod p.
As a hint they give: a^2 + a + 1 \equiv 0 \pmod {p}. If I accept...
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Forum: Lone Mersenne Hunters
2022-01-31, 10:49
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Replies: 2,133
Views: 313,483
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Forum: PrimeNet
2022-01-29, 06:37
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Replies: 0
Views: 350
Link the exponents in ECM progress list
I'm not sure this is the correct subforum, so please move the thread if necessary.
Quite briefly:
It would be very helpful if the exponents in ECM reports (https://www.mersenne.org/report_ecm/)...
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Forum: Lone Mersenne Hunters
2022-01-29, 06:32
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Replies: 2
Views: 483
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Forum: Lone Mersenne Hunters
2022-01-28, 18:32
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Replies: 2
Views: 483
ECM on smaller Mersennes
It was mentioned here before that the smaller Mersennes had a lot of ECM work done outside of Primenet. It's also noticable from the many factors that do not have a corresponding number of curves...
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Forum: CADO-NFS
2022-01-27, 06:47
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Replies: 93
Views: 17,877
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Forum: CADO-NFS
2022-01-27, 06:46
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Replies: 92
Views: 21,786
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Forum: Factoring
2022-01-25, 19:18
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Replies: 55
Views: 4,507
As mentioned earlier you can roughly go by the...
As mentioned earlier you can roughly go by the rule that sieiving times double per 5 additional digits.
I have a i10-10900k that takes about 3-4 days for a 155 digit number. Should be similar in...
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Forum: Aliquot Sequences
2022-01-24, 06:56
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Replies: 3,674
Views: 422,711
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Forum: CADO-NFS
2022-01-23, 16:11
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Replies: 12
Views: 702
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Forum: Lone Mersenne Hunters
2022-01-23, 14:43
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Replies: 391
Views: 77,969
I know, but his chance of finding a factor has...
I know, but his chance of finding a factor has greatly decreased now that I did my curves. Running B1=11M is a more efficient use of ressources at this point, I guess? And since he seems to aim for...
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Forum: Lone Mersenne Hunters
2022-01-23, 07:17
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Replies: 391
Views: 77,969
I don't know where else to post this, I...
I don't know where else to post this, I accidentally completed B1=3M (t40) on M11953 that is assigned to James Hintz. His name pops up often, but I don't know his username here. He might just skip...
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Forum: FactorDB
2022-01-21, 19:21
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Replies: 543
Views: 101,139
Does anyone know if Syd is still reading this...
Does anyone know if Syd is still reading this thread? In the factor tables there's the wrong entry for Proth numbers (called Cullen there) and the Sylvester/Euclid sequence could be fixed so it won't...
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Forum: Aliquot Sequences
2022-01-21, 13:47
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Replies: 3,674
Views: 422,711
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Forum: Riesel Prime Search
2022-01-20, 17:54
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Replies: 307
Views: 59,432
Great to see such progress on the Factorials....
Great to see such progress on the Factorials. Apparently there were so few over the years because few people were working on them. I still think it'd be nice if the work was organized so ranges...
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Forum: Lone Mersenne Hunters
2022-01-20, 17:46
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Replies: 2,133
Views: 313,483
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Forum: Aliquot Sequences
2022-01-20, 17:25
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Replies: 486
Views: 73,339
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Forum: Factoring
2022-01-20, 15:12
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Replies: 55
Views: 4,507
If you use yafu, make sure it will not attempt...
If you use yafu, make sure it will not attempt ECM! As already mentioned it's useless for your number since there will be no small factors. You can do that by invoking yafu factor(12345) -noecm...
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Forum: Aliquot Sequences
2022-01-19, 20:43
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Replies: 3,674
Views: 422,711
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