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-   -   Leyland Primes (x^y+y^x primes) (https://www.mersenneforum.org/showthread.php?t=19347)

lghu 2022-11-08 21:30

Two new Leyland PRP:
101643^87368+87368^101643, index: 6136565930, 502254 digit
101839^83028+83028^101839, index: 6107998207, 500969 digit

lghu 2022-11-08 21:32

[QUOTE=NorbSchneider;617312]Are you from Hungary, can you speak hungarian?[/QUOTE]

Igen.

NorbSchneider 2022-11-24 23:18

Hans: chesswanks.com/num/a094133.txt URL can I not reach. Is offline or online the page?

pxp 2022-11-25 02:25

Hopefully I have fixed it.

NorbSchneider 2022-11-25 13:34

Hopefully I have fixed it.

Yeah it's OK now.

NorbSchneider 2022-12-05 18:12

Another new PRP:
39470^39537+39537^39470, 181723 digits.

NorbSchneider 2022-12-28 19:16

Another new PRP:
515^63898+63898^515, 173280 digits.

bur 2023-01-09 17:03

The 59k+ digits Leyland prime

[URL="https://primes.utm.edu/primes/page.php?id=134631"]3^125330 + 125330^3[/URL]

was proven prime via ECPP in mid December by Greg Childers, which, to my knowledge, makes it the largest prime proven via ECPP. However, so far it hasn't been included in the ECPP list at prime.utm.edu. Does anyone know the reason? The certificate is uploaded and verified to/by factordb.

paulunderwood 2023-01-09 17:50

[QUOTE=bur;622075]The 59k+ digits Leyland prime

[URL="https://primes.utm.edu/primes/page.php?id=134631"]3^125330 + 125330^3[/URL]

was proven prime via ECPP in mid December by Greg Childers, which, to my knowledge, makes it the largest prime proven via ECPP. However, so far it hasn't been included in the ECPP list at prime.utm.edu. Does anyone know the reason? The certificate is uploaded and verified to/by factordb.[/QUOTE]

There have been a few recent ECPP numbers not making their respective top20 tables. I told Prof Caldwell. I guess he is busy retiring. Perhaps someone can email him about these numbers.

frmky 2023-01-09 18:28

I sent an email a couple of weeks ago but haven't gotten a reply. I just chalked it up to some combination of retiring and the holidays.

mart_r 2023-01-09 20:08

[QUOTE=paulunderwood;622081]I guess he is busy retiring.[/QUOTE]

For many people, retirement is the busiest age of their lives. :smile:


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