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Daily AlpacaHack

A CTF challenge series with fun puzzles to enjoy every day

What is Daily AlpacaHack?

We regularly publish simple, beginner-friendly or educational CTF challenges!

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Solve each challenge within its time window to appear on the leaderboard.

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Today's Challenge

Submissions (latest 3)

SOLVED!

Aug 31, 5:20 AM

SOLVED!

Aug 31, 5:13 AM

SOLVED!

Aug 31, 12:27 AM

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Try the first challenge

Is this your first CTF? Let's begin by tackling the first challenge released on Daily AlpacaHack.

AlpacaHack 2100

Upcoming challenges reveal the , , and in advance.

Aug 2026

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Mon

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27

tchen

Web

Easy🌱

145 solves

28

2501

One More Approval

Crypto

Medium

61 solves

29

2501

Misc

Medium

69 solves

30

2501

Misc

Medium

67 solves

31

tchen

Small Image Uploader 2

Web

Medium

63 solves

1

admin

Día Nacional de la Alpaca

Misc

Welcome🌱

240 solves

2

2501

Password, Please

Misc

Easy🌱

206 solves

3-4

ark

Long Long Flag Printer 2026

Misc

Medium

95 solves

5

pppp4649

Crypto

Easy🌱

137 solves

6-8

hiikunz

AESAESAESAESAESAES

Crypto

Hard

60 solves

9-10

tchen

Misc

Medium

85 solves

　

tchen

Misc

Medium

85 solves

11-12

baumroll1234

Fermat's Last Theorem

Misc

Medium

83 solves

13-15

tchen

True or False 2

Misc

Hard

53 solves

16-17

tchen

Web

Medium

77 solves

　

tchen

Web

Medium

77 solves

18-20

tan90909090

wrong instruction

Rev

Hard

59 solves

21-23

tchen

Greetings i18n 2

Web

Hard

52 solves

24-26

tchen

Web

Hard

40 solves

27-28

tan90909090

Let's analyze system calls

Rev

Medium

45 solves

29-31

tchen

Web

Medium

53 solves

　

tchen

Web

Medium

53 solves

1

Planned topicWelcome

Misc

Welcome🌱

2

Coming soon

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Coming soon

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Coming soon

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Rows:

Fermat's Last Theorem

Topic: CReleased: Aug 11, 2026

83 solves

Medium4.0

by

baumroll1234

Tags

According to Fermat's Last Theorem, for an integer $N$ greater than or equal to 3, there are no sets of positive integers $(A, B, C)$ that satisfy $A^N + B^N = C^N$ .

fermats-last-theorem.tar.gz

description solves writeups