Example image of eyePlorer eyePlorer map for '2 (number)': Glyph Number Numeral system 1 (number) 3 (number) Mathematics Natural number Decimal Even Hexadecimal Integer Prime number Factorial prime Lucas number Smarandache–Wellin number Sophie Germain prime Eisenstein prime Markov number Pell number Stern prime Fibonacci number Perrin number Highly composite number 4 (number) 10 (number) Decimal representation Divisor Fraction (mathematics) Computer Radix Addition Exponentiation Multiplication Tetration Computer science Mersenne prime Power of two Irrational number Square root of 2 Set theory Category theory Subobject classifier Factorial Primorial Bell number Harshad number Meander (mathematics) Motzkin number Eight queens puzzle Znám's problem