Published on Nov 8, 2019

5 Number Background Images

License Info: Creative Commons 4.0 BY-NC

5 (five) is a number, numeral, and glyph. It is the natural number following 4 and preceding 6.

Five is the third prime number. Because it can be written as 221 + 1, five is classified as a Fermat prime; therefore a regular polygon with 5 sides (a regular pentagon) is constructible with compass and unmarked straightedge. Five is the third Sophie Germain prime, the first safe prime, the third Catalan number, and the third Mersenne prime exponent. Five is the first Wilson prime and the third factorial prime, also an alternating factorial. Five is the first good prime. It is an Eisenstein prime with no imaginary part and real part of the form 3n − 1. It is also the only number that is part of more than one pair of twin primes. Five is a congruent number.

Five is conjectured to be the only odd untouchable number and if this is the case then five will be the only odd prime number that is not the base of an aliquot tree.


Five is also the only prime that is the sum of two consecutive primes, namely 2 and 3.

Lucky Number 5

People with the lucky number 5 usually tend to pursue freedom. They do not like to be bounded by their surroundings or other people. Since most of them judge or enjoy things with their senses instead of deep thought, they often do things with a bad result. On the one hand, their hedonism helps them to freely control their lives by themselves; on the other hand, the excess freedom or self-indulgence may be self-destructive to some degree.

As for romantic relationships, they hold an open mind and long for love evolving from friendship. Their love affairs are usually based on a steady friendship, not love at first sight. Admittedly, they are good at handling the limits of their love affairs.

Besides, once upon the romantic relationship frustration, they never stay upset for long. In general, people with this lucky number are free, adventurous and energetic. Sometimes, they are full of a sense of curiosity and contradiction.

Strong Points:

Generally speaking, they are quick in mind and action, and always excite people around. With the talents to be a TV program producer, their action is dramatic and amusing. Their inner energetic personality makes them gorgeous, smart, humorous and ingenious. Moreover, they usually have an exploratory spirit so that they can be easily inspired by a sudden idea. Apart from these characteristics, “versatile talent” can be very suitable to describe their uniqueness.

Weak Points:

Due to their hedonism, people often consider them superficial and untrustworthy. Their changeable temper makes them flatulent, demanding and impulsive. Therefore, in daily life, they seem to be very picky and sometimes depressed. People around often speak highly of them. In spite of this, they are not liked sometimes as they show their characteristics of being jealous, greedy, luxurious and satirical. Additionally, they show a severe lack of responsibility.

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