91019
This number is a prime.
Just showing those entries submitted by 'Gevisier': (Click here to show all)
91019 = 100019 - 10009 + 1009 is a palindromic prime whose digits are not prime. Note that 1009, 10009 and 100019 are
the smallest four, five and six-digit primes whose digits are not prime. [Gevisier]
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