Pandigital number: contains all digits 0-9 at least once. Smallest: 1023456789. Zeroless pandigital: uses 1-9. Strictly pandigital: each digit exactly once. The largest pandigital prime is 7652413 (zeroless, 7 digits — no 8 or 9-digit pandigital is prime).
How to Use
Enter number:
- Pandigital?: All digits present?
- Type: Full/zeroless/strict
- Frequency: Digit count map
Pandigital Primes
No 10-digit pandigital number (0-9) is prime! Their digit sum = 0+1+...+9 = 45, divisible by 9. Similarly 1+2+...+9 = 45, so no 9-digit zeroless pandigital is prime. The largest is the 7-digit 7652413.
Types
- Full pandigital: uses 0-9
- Zeroless: uses 1-9 only
- Strictly: each digit exactly once
- n-pandigital: uses 1..n
Step-by-Step Instructions
- 1Enter number.
- 2Check pandigital.
- 3View digit frequency.
- 4Classify type.
- 5Check primality.