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Search: Posts Made By: Dylan14
Forum: Software 2020-11-16, 22:35
Replies: 5
Views: 273
Posted By Dylan14
If you are sieving k*2^n-1 you should consider...

If you are sieving k*2^n-1 you should consider using mtsieve, which has a sieve called fbncsieve which can sieve this form faster than newpgen (and it's multithreaded too).

Anyway, to answer your...
Forum: FermatSearch 2020-11-15, 14:39
Replies: 194
Sticky: Reservations
Views: 27,776
Posted By Dylan14
Taking the following gaps, to test with gfndsieve...

Taking the following gaps, to test with gfndsieve + pfgw with the -gx flag:
n: 80001-80999, k: 25e4-30e4
n: 90001-90999, k: 20e4-25e4
Forum: NFS@Home 2020-11-13, 23:35
Replies: 87
Views: 3,923
Posted By Dylan14
428__749_19m1 was factored: p65 factor:...

428__749_19m1 was factored:
p65 factor: 87068987214238717276344079692716779463986237652028200858012718259
p68 factor: 64933503260370506846776791166099887878358697080264220966191908254307
p93...
Forum: And now for something completely different 2020-11-13, 20:16
Replies: 9
Views: 254
Posted By Dylan14
Doing a quick search with pfgw with the -f1 flag,...

Doing a quick search with pfgw with the -f1 flag, the following numbers are prime or 3-PRP for the form x!^2 +/- 1 up to x = 2000:

0!^2+1
1!^2+1
2!^2+1
3!^2+1
4!^2+1
5!^2+1
9!^2+1
10!^2+1
Forum: Riesel Prime Search 2020-11-04, 02:26
Replies: 383
Views: 44,257
Posted By Dylan14
update 11/3

k = 50171 is at 3.883 M, is on hold for the moment while I do a Carol-Kynea reservation. Please keep it reserved to me.
Forum: And now for something completely different 2020-11-02, 19:33
Replies: 259
Views: 29,465
Posted By Dylan14
Update 11/2

Base 10 at 130k, no primes found, continuing...
Forum: Software 2020-11-02, 16:39
Replies: 457
Views: 37,654
Posted By Dylan14
For anyone that uses Arch Linux or its...

For anyone that uses Arch Linux or its derivatives, I've made mtsieve into an AUR package (https://aur.archlinux.org/packages/mtsieve/). All that's needed to install it is to run

pikaur -S...
Forum: NFS@Home 2020-10-30, 02:36
Replies: 514
Views: 40,937
Posted By Dylan14
553__509_11m1 was factored: p58 factor:...

553__509_11m1 was factored:
p58 factor: 3802646817610203227533918268531415318430147930201954335037
p143 factor:...
Forum: NFS@Home 2020-10-29, 04:28
Replies: 514
Views: 40,937
Posted By Dylan14
Taking 553__509_11m1.

Taking 553__509_11m1.
Forum: And now for something completely different 2020-10-24, 19:24
Replies: 5
Views: 427
Posted By Dylan14
Do you have search limits for these forms?

Do you have search limits for these forms?
Forum: Dylan14 2020-10-24, 18:10
Replies: 19
Views: 4,290
Posted By Dylan14
Introduction to lists

(placeholder)
Forum: NFS@Home 2020-10-12, 14:25
Replies: 87
Views: 3,923
Posted By Dylan14
f45_151m1 was factored: p82 factor:...

f45_151m1 was factored:

p82 factor: 8333609684301502260065482359988445887380053452775916486741008483855806118032252769
p100 factor:...
Forum: And now for something completely different 2020-10-06, 14:46
Replies: 259
Views: 29,465
Posted By Dylan14
Reserving base 10 to 200k. Also formally...

Reserving base 10 to 200k. Also formally unreserving base 2 (was shown as being unreserved a while ago on NPLB, but was still shown as reserved to me on the PrimeWiki.)
Forum: NFS@Home 2020-10-03, 14:22
Replies: 87
Views: 3,923
Posted By Dylan14
8p3_870M was factored: p73 factor:...

8p3_870M was factored:

p73 factor: 1113395195181441232897635316868625150150474892498911434248545375214552261
p120 factor:...
Forum: Msieve 2020-09-26, 15:42
Replies: 2
Views: 549
Posted By Dylan14
Outdated msieve build in Arch AUR

So, I decided to take on a number to post-process for NFS@Home (namely, 8p3_870M), and I wanted to try the number out on an Arch Linux install. I saw in the AUR that there is an msieve package which...
Forum: NFS@Home 2020-09-24, 13:24
Replies: 87
Views: 3,923
Posted By Dylan14
Also reserving f45_151m1 for post-processing.

Also reserving f45_151m1 for post-processing.
Forum: NFS@Home 2020-09-16, 22:09
Replies: 87
Views: 3,923
Posted By Dylan14
Reserving 8p3_870M for postprocessing.

Reserving 8p3_870M for postprocessing.
Forum: NFS@Home 2020-09-16, 22:05
Replies: 514
Views: 40,937
Posted By Dylan14
765__127_7m1 was factored: p69 factor:...

765__127_7m1 was factored:
p69 factor: 247266618809857364769432394200200277984439717886775222264610206604661
p136 factor:...
Forum: NFS@Home 2020-09-07, 00:03
Replies: 514
Views: 40,937
Posted By Dylan14
91997_43m1 was factored: p52 factor:...

91997_43m1 was factored:

p52 factor: 9596265036010581604338742365787303364306581650247103
p157 factor:...
Forum: Alberico Lepore 2020-09-05, 16:52
Replies: 15
Views: 1,397
Posted By Dylan14
Running your choice of equations, I get the...

Running your choice of equations, I get the following:
F = 65107482205674607
A = 781289786468095309/36
B = 65107482205674607/3
C = 65107482205674608/3

so you are correct that F is an integer,...
Forum: Operazione Doppi Mersennes 2020-09-02, 16:32
Replies: 373
Views: 40,011
Posted By Dylan14
Attached are two builds of mmff v0.28.1 (Gary's...

Attached are two builds of mmff v0.28.1 (Gary's source), compiled on Ubuntu 20.04, with Cuda 10.1 and sm_61 (good for Pascal cards, ie GTX10xx). The first build is with a default max sieve size, the...
Forum: Operazione Doppi Mersennes 2020-09-02, 13:24
Replies: 493
Sticky: Reservations
Views: 38,675
Posted By Dylan14
Reserving MMFactor=107,10e15,12e15.

Reserving MMFactor=107,10e15,12e15.
Forum: FermatSearch 2020-09-02, 13:18
Replies: 194
Sticky: Reservations
Views: 27,776
Posted By Dylan14
Range is complete: no factor for k*2^74+1 in k...

Range is complete:
no factor for k*2^74+1 in k range: 8000000000000000 to 9007199254740991 (127-bit factors) [mmff 0.28 mfaktc_barrett128_F64_95gs]
no factor for k*2^74+1 in k range:...
Forum: enzocreti 2020-09-01, 17:13
Replies: 3
Views: 760
Posted By Dylan14
This would be the intersection of 078778 (n such...

This would be the intersection of 078778 (n such that n!+1 is semiprime) and 078781 (n such that n!-1 is semiprime). There is no separate sequence (yet, as far as I can tell).
Forum: Puzzles 2020-08-30, 14:40
Replies: 20
Views: 2,055
Posted By Dylan14
This looked like an interesting problem to code...

This looked like an interesting problem to code up in Python. Here is one code snippet that does the search brute force, like the OP did:


#Challenge - find a power of 2 such that it does not...
Showing results 1 to 25 of 528

 
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