## 29

What is special about the number 29?

1. It is the tenth prime number.
2. It is the fourth primorial prime.
3. It forms a twin prime pair with thirty-one, which is also a primorial prime.
4. It is the sixth Sophie Germain prime.
5. It is the sum of three consecutive squares, 22 + 32 + 42.
6. It is a Lucas prime.
7. It is a Pell prime.
8. It is a tetranacci number.
9. It is an Eisenstein prime with no imaginary part and real part of the form 3n − 1.
10. Since 18! + 1 is a multiple of 29 but 29 is not one more than a multiple 18, 29 is a Pillai prime.
11. It is the 10th supersingular prime.
12. None of the first 29 natural numbers have more than two different prime factors. This is the longest such consecutive sequence.
13. It is the aliquot sum of the odd discrete biprimes 115 and 187 and is the base of the 29-aliquot tree.
14. It is a Markov number, appearing in the solutions to x2 + y2 + z2 = 3xyz: {2, 5, 29}, {2, 29, 169}, {5, 29, 433}, {29, 169, 14701}, etc.
15. It is a Perrin number, preceded in the sequence by 12, 17, 22.
16. Since the greatest prime factor of 292 + 1 = 842 is 421, which is obviously more than 29 twice, 29 is a Størmer number.
17. On the 29th, I will be 29.

100-1 Jalan 2/23A, Taman Danau Kota, 53300 KL (re: Suhaimi’s birthday gifts)

Preferred gifts: books (any title), stationery (planner, diary, notebook, pen, paperweight, etc.), gift voucher. I accept any unwanted Christmas gift. Thank you.

### 6 Responses to 29

1. yus rezal says:

Cis,sungguh-sunggguh aku baca,ingat ke hape,rupa nya befday ko Bal. Apapun Happy Birthday. Hadiah takde..hahaha..

• suhaimiramly says:

hehehehe thanks…yeahh tak sabar aku nak keluar daripada umur 20an ni…kekeke

2. Happy bday bro! nnt aku belanja shisha perasa sirap ros

• suhaimiramly says:

wahh ada shisha sirap…lepas ni perasa durian pulak kot…hehehe thanks anyway for the wishes (p/s: aku tak hisap shisha…kekeke)

• haha takpa belanja lain pun boleh, sambil2 tu boleh aku mintak khidmat nasihat psl bisnes lagi hehe..

• suhaimiramly says:

jom lepak castle bebila…nak khidmat nasihat kena tanya otai bisnes, e.g. Mr SJ