16171...14243 (56-digits)
This number is a prime.
161718 1920212223 2425262728 2930313233 3435363738 3940414243
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The smallest prime of the form concatenation of integers from 16 to n (= 43). [Marcel]
Submitted: 2026-06-16 07:03:19; Last Modified: 2026-06-21 14:32:04.
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