Owlet puzzle #43
Released Monday, August 17, 2026 UTC
1234567891
the answer for puzzle #43
The five clues
- A ten-digit prime with a memorable digit pattern.
- Its digits are 1,2,3,4,5,6,7,8,9,1 in order.
- A ten-digit prime whose digits climb 1 → 9 then wrap back to 1.
- 10-digit prime; digits form a cyclic 1→9→1 pattern.
- The counting climb, primed and complete.
Backstory
1234567891 is prime — the ten-digit natural counting run 1234567890 with a final +1 lands cleanly on a prime. Its neighbors 1234567890 = 2 · 3² · 5 · 3607 · 3803 and 1234567892 = 2² · 308641973 are both composite.
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