Something's fishy
 

TPS is now on n=483585, and no prime has been found since n=482995. Is this normal, or should some of the n=482995-483585 range be doublechecked?

It's definitely unexpected, but still possible. There's about 19,000 candidates in that range, which at sieve depth p=3P has an expected 3.6 primes (odds of one or more prime 97.2%). That leaves a 3% chance of [i]not[/i] finding any primes in that range, which is rare but does happen on occasion.

I suspect that a Covering Set of Titanic Numbers might
move this problem into the past.

We've finally ended the prime-free gap. 98883*2^483634-1 is prime (but not twin).