On

http://primes.utm.edu/top20/page.php?id=6
There is an open problem to find a cullen prime p*2^p+1 where p is also prime. Has anyone done anywork on this?

I tried to write a crude sieving program. There are ~9000 candidates left under p=5 million when the range is sieved to 350 Million.

Factors available on request.

Is anyone interested in improving on these results. Writing a faster sieve software? Any thoughts on how to solve this problem?

Thanks!