This number is a prime.
The sum of first 2803 primes + 2 + 8 + 0 + 3 is prime. [Bopardikar]
The first Honaker prime that is the sum of a previous Honaker prime and it's index, i.e., 2441 + 362. [Homewood]
2803 is the first Honaker prime with digit 8 (the 83rd digit in the sequence). Note that 83 is the first prime with digit 8 and π(83) = 28+0-3!. [Worrom]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell