421 (the 82nd prime)
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419
Octal
(645)
_{8}
Hexadecimal
(1A5)
_{16}
Prime gap
10
39th
Prime of the Form 3n+1
11
^{2}
+ 3 * 10
^{2}
40th
Prime of the Form 4n+1
14
^{2}
+ 15
^{2}
20th
Euler prime number
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