List of recent champions for factoring Cunningham numbers:

Pollard p-1:
5267	P58	2,2098M	P. Zimmermann
4871	P57	6,396+	P. Zimmermann

Special number field sieve by size of number factored:
5501	c307	2,1039-	K.Aoki+J.Franke+T.Kleinjung+A.K.Lenstra+D.A.Osvik
5331	c274	6,353-	Aoki+Kida+Shimoyama+Ueda

Special number field sieve by SNFS difficulty:
5501	c307	2,1039-	K.Aoki+J.Franke+T.Kleinjung+A.K.Lenstra+D.A.Osvik
5787	c274	5,398+	G.Childers+B.Dodson

General number field sieve by size of number factored:
5723	C182	2,1157-	J.Bos+T.Kleinjung
5667	C180	5,421-	Mersenneforum+Womack

Elliptic curve method:
5418	P67	10,381+	B. Dodson ECMNET
5135	P66	3,466+	B. Dodson ECMNET

Largest penultimate prime factor (ultimate factor shown also):
5714	p128*p140 5,383+    Childers/Dodson
5654	p127*p136 6,392+    Childers/Dodson

	First five holes in each table on December 12, 2009

2,887-	c210	2,899-	c185	2,913-	c233	2,919-	c261	2,929-	c214
2,881+	c190	2,887+	c207	2,913+	c232	2,947+	c212	2,955+	c214
2,1706M	c244	2,1714L	c191	2,1714M	c168	2,1718L	c233	2,1718M	c200
2,904+	c210	2,932+	c200	2,956+	c187	2,964+	c198	2,980+	c162

3,551-	c238	3,563-	c199	3,569-	c231	3,589-	c213	3,593-	c214
3,548+	c197	3,559+	c225	3,562+	c255	3,563+	c239	3,568+	c268

5,383-	c183	5,389-	c231	5,391-	c161	5,397-	c258	5,409-	c282
5,361+	c221	5,373+	c214	5,377+	c171	5,382+	c172	5,386+	c223

6,349-	c209	6,355-	c206	6,365-	c185	6,371-	c217	6,373-	c287
6,323+	c221	6,331+	c227	6,332+	c177	6,338+	c222	6,344+	c190

7,311-	c225	7,323-	c241	7,335-	c219	7,337-	c213	7,353-	c263
7,314+	c215	7,320+	c201	7,323+	c229	7,326+	c258	7,331+	c253

10,269-	c233	10,271-	c214	10,277-	c224	10,281-	c210	10,283-	c211
10,248+	c199	10,268+	c243	10,272+	c212	10,274+	c253	10,275+	c188

11,241-	c220	11,257-	c226	11,263-	c209	11,265-	c202	11,269-	c233
11,254+	c228	11,263+	c252	11,269+	c202	11,271+	c267	11,272+	c201

12,247-	c209	12,257-	c218	12,269-	c205	12,271-	c234	12,277-	c285
12,254+	c230	12,265+	c185	12,266+	c179	12,271+	c250	12,274+	c213