Which of the following is a prime number?

23882990

16769023

38377296

11723835

A prime number has no positive divisors other than 1 and itself. Hence, a prime bigger than 2 cannot be even. All prime numbers bigger than 5, written in the usual decimal system, end in 1, 3, 7, or 9.

Sumit Tamang

Procsilas Moscas

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Malaysia

15%

76%

India

72%

161

Unknown

72%

22%

Republic of Ireland

11%

72%

11%

the United States

71%

10%

270

the Netherlands

69%

26%

Australia

68%

11%

14%

the United Kingdom

10%

66%

10%

136

Germany

14%

62%

14%

Poland

10%

61%

17%

16347

Austria

60%

20%

13%

Ghana

11%

58%

29%

Greece

22%

55%

16%

Canada

23%

50%

15%

France

27%

50%

11%

the Philippines

34%

48%

Spain

30%

10%

Pakistan

26%

31%

36%

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