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Found a couple small "EQ" (Eisenstein-Mersenne cofactors, OEIS [URL="http://oeis.org/A125743"]A125743[/URL]/[URL="http://oeis.org/A125744"]4[/URL]) (probable) primes:
(3^152809+3^76405+1)/7 is a 2-PRP! (3^272141-3^136071+1)/7 is a 2-PRP! (3^505823+3^252912+1)/7 is a 2-PRP! (241339 digits) (3^1353449-3^676725+1)/7 is a 2-PRP! (645759 decimal digits) [B]Time: 10953.669 sec.[/B] Notes: 1. The running time. With most tools you will get > 20000 sec. This is because of the implementation of FFT modulo 3[SUP]3p[/SUP]+1 with only final step done modulo N. 2. All of similar (composite or prime) numbers are 3-PRPs. Re-validating now with -b5, -b11. |
Small prime, but for me it is huge :)
[URL="http://primes.utm.edu/primes/page.php?id=117862"]Fifth in his class in the world[/URL] (currently) of course :)) 94 followed but 466002 number nine :) |
The Riesel Problem: one less to go
A new elimination from the Riesel Problem is currently in the [URL="http://primes.utm.edu/primes/page.php?id=118583"]UTM queue[/URL] (into position 20!)
Congrats to PrimeGrid! |
[QUOTE=Batalov;384236]A new elimination from the Riesel Problem is currently in the [URL="http://primes.utm.edu/primes/page.php?id=118583"]UTM queue[/URL] (into position 20!)
Congrats to PrimeGrid![/QUOTE] Another one! 502573*2^7181987 - 1 is prime!:smile: Congrats to PrimeGrid. |
[URL]http://primes.utm.edu/primes/page.php?id=118597[/URL]
Congratulations to my teammate! |
99*10^303255-1 is prime! (303257 decimal digits, P = 33) Time : 2119.757 sec. :smile:
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Hi Pepi
Congrats, but it seems it's not enough for top 20 near-repdigits: [URL="http://primes.utm.edu/top20/page.php?id=15"]http://primes.utm.edu/top20/page.php?id=15[/URL] |
[QUOTE=Kosmaj;401394]Hi Pepi
Congrats, but it seems it's not enough for top 20 near-repdigits: [URL]http://primes.utm.edu/top20/page.php?id=15[/URL][/QUOTE] I know that fact, but it is rare prime :) Hunting is continued :) |
Last was not in Top 5000 , but this fellow is :)
92*10^544905-1 is prime! (544907 decimal digits, P = 5) Time : 7082.969 sec. Reported and verified on Top 5000 :) |
[QUOTE=pepi37;402390]Last was not in Top 5000 , but this fellow is :)
92*10^544905-1 is prime! (544907 decimal digits, P = 5) Time : 7082.969 sec. Reported and verified on Top 5000 :)[/QUOTE] Congrats. That is a lot of nines in its decimal expansion :smile: |
[QUOTE=paulunderwood;402392]Congrats. That is a lot of nines in its decimal expansion :smile:[/QUOTE]
Yes, 544905 nines :) |
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