Dodge the Mods! Counting Game!

[Tragonight]

520.

 

[TampaBondo]

521 is a prime number.


521 has a representation as a sum of two squares: 521 = 11[SUP]2[/SUP] + 20[SUP]2[/SUP].


521 is the 13th Lucas number.


521 and 523 for a twin prime pair.


521 is the hypotenuse of a primitive Pythagorean triple: 521[SUP]2[/SUP] = 279[SUP]2[/SUP] + 440[SUP]2[/SUP].


521 has the representation 521 = 2[SUP]9[/SUP] + 9.


521 is the exponent of the Mersenne prime 2[SUP]521[/SUP] - 1.


521 is the smallest prime whose reversal is a cube: 125 = 5[SUP]3[/SUP].



Galaxy cluster Abell 521 is located about 2.9 billion light-years from Earth.

 

[Tragonight]

5 tutu

 

[TampaBondo]

 

[Tragonight]

524.

 

[TampaBondo]

525.

 

[Tragonight]

526.

 

[TampaBondo]

527.

 

[Tragonight]

528.

 

[TampaBondo]

 

[Tragonight]

529.......

 

[TampaBondo]

530...yeah...oops...

 

[Tragonight]

531.

 

[TampaBondo]

532...No.

 

[Tragonight]

533

Fine