In honor of the 244th birthday of Marie-Sophie Germain, French mathematician and namesake of the Sophie Germain Prime Search subproject,
The Sophie German Birthday Challenge 1/1/20 12:00 UTC,  to 1/4/20 11:59:59 UTC 3 days.
Link to the PG challenge thread.  http://www.primegrid.com/forum_thread.php?id=9086
 
 
 
These are short tasks with a good chance of finding a prime number.
The primes are too small to be added to the book of the 5000 largest primes, but a prime is a prime.
 
There is no bunkering, only tasks downloaded after the start and turned in before the end count. 
Doing one task per core would be ok since the tasks are small and most likely give the best throughput 
If running MT I would not do more than 2 cores on one task to cut the time per task.
 
As with all PG tasks, the CPU can run on the warm side so blow out the dust bunnies and make sure fans work and so on.
 
Good luck everyone.

They certainly are short. I got a good idea last night on how long the multi-core tasks took and I will try a single core run soon to find the sweet spot. This could be a great one for servers.
Thanks bill....
 
Another overlap with FB by the way.

I'll be running single core tasks with HT off, as it seems to be about 10% faster on my old stuff.

That's probably the best bet. 

Single cores are definitely the most efficient for me.  Also good for finding primes on my machines, unless a bunch of folks switch to 2 cores for the challenge...

Dear Primefinder,

Congratulations! Our records indicate that a computer registered by you has found a unique prime number. This computer is assigned to the Sophie Germain (LLR). Since candidates on this subproject are not large enough to report to the Top 5000 Primes List, your prime is visible immediately.

Workunit 653162049 : 5082423450225*2^1290000-1 (388342 digits)

bill1024
Dear Primefinder,

Congratulations! Our records indicate that a computer registered by you has found a unique prime number. This computer is assigned to the Sophie Germain (LLR). Since candidates on this subproject are not large enough to report to the Top 5000 Primes List, your prime is visible immediately.

Workunit 653162049 : 5082423450225*2^1290000-1 (388342 digits)

Congrats!!!

Thank you. 
 
Must be my lucky day.
 
Dear Primefinder,

Congratulations! Our records indicate that a computer registered by you has found a unique prime number. This computer is running BOINC, is attached to the PrimeGrid project, and is assigned to the Sophie Germain (LLR). Since candidates on this subproject are not large enough to report to the Top 5000 Primes List, your prime is visible immediately.
Workunit 653580084 : 5112599136225*2^1290000-1 (388342 digits)

It's crazy time for me... 3!
 
Dear Primefinder,

Congratulations! Our records indicate that a computer registered by you has found a unique prime number. This computer is assigned to the Sophie Germain (LLR). Since candidates on this subproject are not large enough to report to the Top 5000 Primes List, your prime is visible immediately.

Workunit 652333204 : 5023585127715*2^1290000-1 (388342 digits)
 
Dear Primefinder,

Congratulations! Our records indicate that a computer registered by you has found a unique prime number. This computer is assigned to the Sophie Germain (LLR). Since candidates on this subproject are not large enough to report to the Top 5000 Primes List, your prime is visible immediately.

Workunit 652539227 : 5037543683097*2^1290000-1 (388342 digits)
 
Dear Primefinder,

Congratulations! Our records indicate that a computer registered by you has found a unique prime number. This computer is assigned to the Sophie Germain (LLR). Since candidates on this subproject are not large enough to report to the Top 5000 Primes List, your prime is visible immediately.

Workunit 653722205 : 5122789803087*2^1290000-1 (388342 digits)

From the PG thread
 
Only a few hours left on the clock!

Challenge: Sophie Germain's Birthday
App: 2 (SGS-LLR)
(As of 2020-04-04 04:31:17 UTC)

3379887 tasks have been sent out. [CPU/GPU/anonymous_platform: 3378673 (100%) / 0 (0%) / 1214 (0%)]

Of those tasks that have been sent out:

8827 (0%) were aborted. [8827 (0%) / 0 (0%) / 0 (0%)]
2579 (0%) came back with some kind of an error. [2579 (0%) / 0 (0%) / 0 (0%)]
3250356 (96%) have returned a successful result. [3250984 (96%) / 0 (0%) / 1206 (0%)]
119877 (4%) are still in progress. [119776 (4%) / 0 (0%) / 8 (0%)]

Of the tasks that have been returned successfully:

99945 (3%) are pending validation. [100207 (3%) / 0 (0%) / 31 (0%)]
3145171 (97%) have been successfully validated. [3145534 (97%) / 0 (0%) / 1175 (0%)]
5010 (0%) were invalid. [5011 (0%) / 0 (0%) / 0 (0%)]
230 (0%) are inconclusive. [232 (0%) / 0 (0%) / 0 (0%)]

The current leading edge (i.e., latest work unit for which work has actually been sent out to a host) is k=5161155314187. The leading edge was at k=5025298185495 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 2.70% as much as it had prior to the challenge!