The number 5353714662021596247595065017236556037762353639503 is the nineteenth power of a positive integer.
Find the integer using just pen and paper.
(In reply to An analytic start and a calculator finish
All I know without calculator :
1. N is a 3-digit number, between 300 and 400.
2. The units digit of N is 7 (7931 being the cycle, 3 is in 19th place)
So the number is 3?7 - to find "?" - few calculators trials.
... Who called it a p&p problem?