[QUOTE=ET_;141429]Amazingly, on September 6th, another computer claims finding a new Mersenne prime!!
Independent verification has begun and should complete on the 11th.

Last updated: September 8, 2008

It seems that the second one is much smaller... :)

Luigi[/QUOTE]

It is just guessing, but can it be, that during the verification process only FFT sizes are used that are a power of 2? For example because it is not so easy to run a 5*2^(n-3) on massive parallel computers?

That could be a reason, why a 4096k FFT was used for M45 and now a 2048k could be enough if the exponent is below 39 Million or so?

That way it is easily possible that the verification of such a candidate is more than twice as fast.

By the way...
In the improbable case that there is every 10 days or so a new Mersenne prime is dicovered until Christmas, do we have to wait until then before all Primes are published?...

[quote=ET_;141447]On another thought, did you notice that 17 Mersenne numbers over 100 million digits have been manually reserved for LL test, 15 of which by "ANONYMOUS"?

Is [I]someone[/I] testing his new software or cluster? :smile:

Luigi[/quote]
[I]Someone[/I] probably just didn't care to set "OutputIterations=1" and may not have a slightest idea that it will take them several CPU-years for each test. But hey, who knows! There's a 1 in 2,300,000 chance that the exponents [I]someone[/I] is testing would be an M50. That's a chance [I]worth[/I] taking. :smile:

[QUOTE=biwema;141487]In the improbable case that there is every 10 days or so a new Mersenne prime is dicovered until Christmas, do we have to wait until then before all Primes are published?...[/QUOTE]

Yes.

In that case, people would probably find out what the earlier primes are and end up leaking the information. Someone with a quad-core machine or two could probably test almost a dozen exponents in four months. :smile:

[QUOTE=patrik;141478]I ran P-1 again on those potential prime exponents that had only stage 1 done. No factors were found. All results were reported via primenet, except the last one which primenet for some reason does not accept.
[/QUOTE]

This could be a new line of attack. Is there a way you could send results about the other 10 potential primes to primenet?

The residue of M37763179 (0xB[B]1[/B]4[B]1[/B]C[B]1[/B]5[B]1[/B]483C99__) also sticks out. Does anyone notice the pattern of ones?

[QUOTE=Prime95;141458]
Please no screaming, but Scott is looking at September 15th.[/QUOTE]

Why was the date pushed back? Maybe they want to wait for 2 verifications to finish. Or maybe they had to move the verification to a slower computer. Or maybe it's just to throw off the sleuthers.

[QUOTE=jinydu;141515]Why was the date pushed back? Maybe they want to wait for 2 verifications to finish. Or maybe they had to move the verification to a slower computer. Or maybe it's just to throw off the sleuthers.[/QUOTE]

Just speculating, but maybe it is because Scott has a press contact that works Monday through Friday.

[QUOTE=patrik;141478]I ran P-1 again on those potential prime exponents that had only stage 1 done. No factors were found. All results were reported via primenet, [B]except the last one which primenet for some reason does not accept[/B].
[/QUOTE]

On the other hand, it might have been nothing more than luck. How about you try reporting it a few more times?

If it still doesn't work after a few more attempts... What error message do you get?

[QUOTE=Prime95;141517]Just speculating, but maybe it is because Scott has a press contact that works Monday through Friday.[/QUOTE]

According to mersenne.org the verification of "M46" is due on Sept. 11th --> that's a Thursday.

But... wait! It only says "...on the 11th" without giving a month. Does it mean [b]October[/b] 11th, which is indeed a saturday? This would correspond to my [URL="http://www.mersenneforum.org/showpost.php?p=141423&postcount=81"]wild guess[/URL]...

[QUOTE=Prime95;141458]Bingo. The report won't change unless Scott modifies the program that creates the report. I doubt that is a high priority for him.[/quote]

But why was it not able to keep saying "Prime, UNVERIFIED, [b]2[/b]"?

[QUOTE=Andi47;141523]According to mersenne.org the verification of "M46" is due on Sept. 11th --> that's a Thursday.[/QUOTE] Think about it, what will get most coverage that day? The 7th anniversary of the attacks. Ok, lets wait till Friday. That is often a day to release a story that one wants to hide. Mondays are better.

[quote]But... wait! It only says "...on the 11th" without giving a month.[/quote]In situations like this, the preceding month spoken of is to be inferred.