[URL="http://primes.utm.edu/primes/page.php?id=118832"]6 · 258^212134 - 1[/URL] is prime; R258 is proven.

[QUOTE][URL="http://primes.utm.edu/primes/page.php?id=118832"]6 · 258^212134 - 1[/URL] is prime; R258 is proven. [/QUOTE]

Wow. That's one heck of a roll you are on Serge. Keep it up.

:smile::bump2::smile:

[QUOTE=Batalov;388624][URL="http://primes.utm.edu/primes/page.php?id=118832"]6 · 258^212134 - 1[/URL] is prime; R258 is proven.[/QUOTE]

:bounce::showoff::george:

Waaa... man! That's the spirit, haha.
Congrats!

S311
 

[URL="http://primes.utm.edu/primes/page.php?id=118836"]10 · 311^314806 + 1[/URL] is prime; S311 is proven.

[QUOTE=Batalov;388651][URL="http://primes.utm.edu/primes/page.php?id=118836"]10 · 311^314806 + 1[/URL] is prime; S311 is proven.[/QUOTE]

Congratulations! Did you recently stumble upon a secret stash of cores? :grin:

[QUOTE=Batalov;388651][URL="http://primes.utm.edu/primes/page.php?id=118836"]10 · 311^314806 + 1[/URL] is prime; S311 is proven.[/QUOTE]

Congrats again!! I think Serge has been hording primes. lol

[URL="http://primes.utm.edu/primes/page.php?id=118857"]2564 · 75^610753 + 1[/URL] is prime (1,145,203 digits); S75 is a "wanker".

[QUOTE=Batalov;388964][URL="http://primes.utm.edu/primes/page.php?id=118857"]2564 · 75^610753 + 1[/URL] is prime (1,145,203 digits); S75 is a "wanker".[/QUOTE]

Congrats again! A nice huge prime that comes in at #72 in the top-5000.

[URL="http://primes.utm.edu/primes/page.php?id=118912"]373 · 520^342177 + 1[/URL] is prime; S520 is a 1-ker (will continue to n=400k).

[URL="http://primes.utm.edu/primes/page.php?id=118930"]30 · 7^670289 + 1[/URL] (= 1470 · 343^223429 + 1) eliminates k=1470 from S343; S343 and R343 are 5-kers.