124043

Appears in sequences

• Concatenation of n in base 2 up to base 10 and n in base 10 down to base 2 is prime, all numbers are interpreted as decimals.at n=19A054258
• Main diagonal of table A083087.at n=10A083090
• Absolute discriminants of imaginary quadratic number fields with elementary bicyclic 7-class group (7,7).at n=2A359872