This number is a prime.
(1783, 8317) is the first of only two pairs of primes concatenated from two complementary double-digit primes (17, 83). The 2nd pair is (2971, 7129). [Loungrides]
The year the first untethered manned hot air balloon flight was flown. [Gaydos]
The smallest number n for which the total number of digits in the first n Cyclops primes is a Cyclops prime (11093). [Gaydos]
The sum of the first 1783 Honaker primes, i.e., (131 + 263 + 457 + 1039 + ... + 541217 + 541237), is a Cyclops prime. [Bajpai]