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MathNet 2017-part-05 — 176 problems (EN–VI) Question 35

Math Olympiad Vault · MathNet 2017-part-05 — 176 problems (EN–VI)

Question 35

Find all prime numbers with $n \ge 3$ digits, having the property: for every $k \in \{1, 2, \dots, n-2\}$, deleting any $k$ of its digits leaves a prime number.