done.
here is the sieve file and the output.

and a third post in a row for taking R638, from 50k to 100k.
I forgot to say that nothing were found in my R533 hunt.

Taking S720, R581, and R619 to n=200000.

Update R751
 

I found 200 primes (see attachemend) an finished up to n=5835.
I'll continue with this range.

R507 is complete to n=100000. Here are the found primes:

2974*507^30421-1
2404*507^32960-1
5616*507^33219-1
382*507^35153-1
6206*507^35737-1
11266*507^37654-1
380*507^39828-1
9096*507^41986-1
9686*507^42206-1
10016*507^44737-1
2918*507^45439-1
5276*507^46031-1
10386*507^50385-1
7904*507^51308-1
5884*507^64759-1
2808*507^71920-1
4634*507^80663-1
9276*507^95530-1
4124*507^98983-1

I've e-mailed the residues for the other k to Gary.

[QUOTE=Rincewind;337637]I found 200 primes (see attachemend) an finished up to n=5835.
I'll continue with this range.[/QUOTE]

Are you sure that you want to keep this reserved to n=25K? It took you 2 months to do n=2500-5800. At that rate, it would likely take you 1-2 years to get it to n=25K.

R968 is complete to n=250K
R514 is complete to n=200K
R601, R780, R783 are complete to n=100K
No primes except one for R783 that was previously reported.
Residues attached.

Reserving R883, R889 to n=100K.

[QUOTE=gd_barnes;338221]Are you sure that you want to keep this reserved to n=25K? It took you 2 months to do n=2500-5800. At that rate, it would likely take you 1-2 years to get it to n=25K.[/QUOTE]

I don't test 24/7. I'd like to keep this range, because there are plenty ranges and conjectures which are free to be reserved by other contributors and I don't see a reason why I should cancel this conjecture. I can cut the range down to a smaller n-value. If you think I should cancel the this range or reduce the n-value feel free to contact me.

[QUOTE=Rincewind;338420]I don't test 24/7. I'd like to keep this range, because there are plenty ranges and conjectures which are free to be reserved by other contributors and I don't see a reason why I should cancel this conjecture. I can cut the range down to a smaller n-value. If you think I should cancel the this range or reduce the n-value feel free to contact me.[/QUOTE]

No problem. I just wanted to make sure that you knew what you were up against.

That's nice from you, thank you.
So I'll keep the range and if someone really wants this range I'llmunreserve it.

R836
 

R836 tested n=100K-200K - nothing found

Results emailed - Base released