Class: Integer

Inherits:

Object

• Object
• Integer

Defined in:

lib/open_classes/integer/palindromic_prime.rb

Instance Method Summary

• #palindromic_prime? ⇒ Boolean

  Returns true if value is palindromic prime, false for a composite.

Instance Method Details

#palindromic_prime? ⇒ Boolean

Returns true if value is palindromic prime, false for a composite.

Example

0.palindromic_prime? # => false
1.palindromic_prime? # => false
2.palindromic_prime? # => true
11.palindromic_prime? # => true
757.palindromic_prime? # => true
758.palindromic_prime? # => false

Returns:

• (Boolean)

# File 'lib/open_classes/integer/palindromic_prime.rb', line 16

def palindromic_prime?
  prime? && to_s == to_s.reverse
end