11223355555888888883

This number is a prime.

1122335555 5888888883

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Contains one 1, one 1, two 2s, three 3s, five 5s, eight 8s; and is the first prime of this type. Note the Fibonacci sequence. [Marcel]

Submitted: 2026-04-14 14:57:55; Last Modified: 2026-04-14 16:09:14.