487-488 and 497-499 complete, one prime: 241 497679

Taking 507-508.

503-504 complete, no primes
Taking 508-509

504-505 complete, no primes.

Taking 509-510.

501-502 complete, no primes.

Taking 510-512.

505-506 complete, no primes.
Taking 512-513

509-510 complete, no primes.

Taking 513-514.

513-514 complete, no primes.

Taking 514-515.

480-485 complete, one prime (203 480918)

508-509 and 512-513 complete, no primes.
Taking 515-517

507-508 complete, no primes.
Taking 517-518.

421-422 completed by John, one prime found!
To be announced after he reports it to Top-5000 which is delayed because he misplaced his password.

510-512 complete, no primes.

Taking 518-519.