753*2^561335-1 is prime

861*2^572559-1 is a confirmed prime

855*2^572656-1 is prime k15(29)

821*2^561774-1 is prime! Time : 921.0 sec.

[quote=IronBits;151289]821*2^561774-1 is prime! Time : 921.0 sec.[/quote]

Please submit it.

[quote=em99010pepe;151290]Please submit it.[/quote]
Quoted from earlier in this thread:
[quote=IronBits;150510]gd_barnes, if 741*2^557981-1 needs to be submitted, have at it. :smile:[/quote]
Presumably, this still holds true for additional primes. :smile:

Sure, you or Gary, no matter. First one to see it can have at it :wink:

[quote=IronBits;151303]Sure, you or Gary, no matter. First one to see it can have at it :wink:[/quote]
:grin: :wink:

I saw it first! lol

[quote=Flatlander;151307]I saw it first! lol[/quote]
LOL--you know, that just gave me an idea. Since David doesn't want his primes, maybe we could raffle them off, say, as prizes for whoever produces the most results during our next rally? No, wait...usually that's either Gary or Lennart, both of which usually get plenty of primes anyway. :missingteeth:

[quote=mdettweiler;151311]LOL--you know, that just gave me an idea. Since David doesn't want his primes, maybe we could raffle them off, say, as prizes for whoever produces the most results during our next rally? No, wait...usually that's either Gary or Lennart, both of which usually get plenty of primes anyway. :missingteeth:[/quote]
Maybe we could raffle them off, with 'tickets' being awarded based on results, BUT instead of being a linear thing (1000 results gets 1000 'tickets', 10 gets 10, etc.), have it be some sort of logarithmic thing to encourage smaller hitters with a chance while rewarding heavy hitters a little more appropriately (maybe something like 10*log[sub]10[/sub](number of results) ?).