Q: What is the largest 3 digit prime each of whose digits is a prime?

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67

961

23 or 41

9409

Ten.

Related questions

The largest 3 digit number whose digits are all primes is 777. The largest 3 digit number with different prime digits is 753.

The largest three digit prime number whose digits are all primes is 773.

Smallest is 11 & Largest is 77.

7777

73 satisfies your condition.

How about: 773

61 is prime. You cannot make 61 by multiplying four digits.

The smallest two-digit prime number whose digits themselves are prime is 23. Both 2 and 3 are prime numbers, and together they form the prime number 23.

Two-digit prime numbers whose digits add up to 10 are:193773

992

67

11, 19, 41, 61, and 89