This number is a prime.
Both 19141939 and 1914 + 1939 are primes. Note that 1914 and 1939 are the years that WWI and WWII began. [Heller]
Both 19141939 and 1914 + 1939 are primes. Note that 1914 and 1939 are the years that WWI and WWII began. [Heller]