S166
 

Sierp Base 166
Conjectured k = 140947
Covering Set = 7, 13, 43, 167
Trivial Factors k == 2 mod 3(3) and k == 4 mod 5(5) and k == 10 mod 11 (11)

Found Primes: 67855k's - File emailed

Remaining k's: 225k's - Tested to n=10K - File emailed

Trivial Factor Eliminations: 72609k's

MOB Eliminations: 254k's - File emailed

GFN's:
166
27556

Base Released

R217 is complete to n=100K; 1 prime was found for n=50K-100K shown below; 6 k's remain; base released.

Prime:
1106*217^90905-1

R235 is complete to n=100K; 5 primes were found for n=25K-100K shown below; 10 k's remain; base released.

Primes:
[code]
3270*235^34802-1
4032*235^35848-1
2148*235^50099-1
30*235^56835-1
1136*235^83633-1
[/code]

Releasing R148 and S148 due to lack of activity and response over 4-6 months.

will take over R148

[QUOTE=firejuggler;272952]will take over R148[/QUOTE]

Welcome to CRUS firejuggler. If you have any questions about sieving or testing, let us know.

Can I ask what range you plan to sieve and test and how many cores can you dedicate to it? 7 k's at n=120K for such a high base is a lot of work. One modern quad-core running all 4 cores 24x7 should be enough but progress will still be slow.

S249 is complete to n=100K; 2 primes were found for n=50K-100K shown below; 8 k's remain; base released.

Primes:
286*249^52498+1
754*249^54387+1

in the beginning i was planning to do 120-200k, on a core 2 duo... upon sieving /llr'ing i'll do it up to 130k only.

ok, back to reality . i won't be able to do this. releasing b148...
find k=1256 sieved up to 1.13e12 and the other k sieved up to 67.5e9
sorry again. (n 120k-130k)

Reserving S166 to n=25K (recommended base). Rough time estimate is 2 weeks.

Reserving S171 and S211 to n=100K.