Problem 47895. List the dihedral primes
The number 1880111 is a dihedral prime (or dihedral calculator prime) because on a seven-segment display it is prime (a) forward, (b) upside-down, (c) in a mirror, and (d) in a mirror upside-down. The number 120121 is the smallest dihedral prime that forms four different numbers read in those four ways.
Write a function to list the dihedral primes less than or equal to the input number.
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1 Comment
mahesh kumar
on 11 Dec 2020
Thank you!
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Group
Prime Numbers II
- 19 Problems
- 7 Finishers
- List the delete-a-digit primes
- List the dihedral primes
- List the good primes
- Determine whether a number is a prime self number
- Compute home primes in a given base
- List Proth primes
- Label primes with the Erdos-Selfridge classification
- List Honaker primes
- List the nth prime quartet prefix
- Find the smallest prime with n inside
- List prime anagrams of a number
- Determine whether a number is unprimeable
- Count the primes in Collatz sequences
- Play Outside In with primes
- Identify prime words
- Find pairs of primes with the same digit sum and a specified separation
- List composite numbers that cannot be written as the sum of two primes
- Compute the arithmetic derivative of integers
- Solve the arithmetic differential equation D(n) = n
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