question edit history translations

How many prime numbers are there?

less than googol

more than googol, but less the Graham's number

145443097811127

infinitely

The prime number is a natural number that can be divided, without a remainder, only by itself and by 1. For example, 5 can be divided only by 5 and by 1. There are infinitely many primes, as demonstrated by Euclid around 300 BC. The picture above shows the Ulam spiral, which is a graphical depiction of the set of prime numbers.

Ninjai

1

wikimedia wikipedia → Prime number

mathematicsnumbersscience

Numbers quiz Mathematics quiz Science quiz

You will play as

Answers by country

Belgium

10%

0%

0%

90%

10

Greece

0%

0%

15%

84%

13

Canada

0%

5%

5%

83%

18

Austria

6%

6%

2%

82%

80

the Netherlands

4%

8%

4%

82%

23

Germany

4%

6%

6%

81%

494

France

7%

11%

0%

81%

27

Poland

6%

7%

5%

79%

5422

Switzerland

8%

6%

6%

76%

47

Australia

3%

10%

10%

75%

28

Pakistan

13%

0%

13%

73%

15

the United States

3%

13%

11%

70%

133

Republic of Ireland

16%

5%

11%

66%

18

India

5%

15%

11%

65%

138

the United Kingdom

12%

14%

11%

60%

104

Ghana

0%

33%

0%

58%

12

Nigeria

0%

18%

18%

54%

11

What is the sum of the opposite sides of a dice?

Augustus was born on 1 January 10BC. Which birthday did he celebrate at 1 January 10AD?

How many edges does a Möbius strip have?

In maths, what is aleph-zero?

the cardinality of the set of all countable ordinal numbers

the cardinality of the set of all natural numbers

the base value of the natural logarithm

the cardinality of the set of real numbers