List of recent champions for factoring Cunningham numbers:

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
5331	c274	6,353-	Aoki+Kida+Shimoyama+Ueda

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 July 13, 2009

2,863-	c234	2,877-	c178	2,887-	c210	2,899-	c185	2,913-	c233
2,851+	c214	2,853+	c221	2,859+	c233	2,865+	c178	2,869+	c222
2,1642L	c191	2,1646L	c208	2,1654L	c195	2,1678L	c197	2,1678M	c197
2,856+	c223	2,904+	c210	2,932+	c200	2,956+	c238	2,964+	c198

3,551-	c238	3,563-	c199	3,569-	c231	3,589-	c213	3,593-	c214
3,509+	c171	3,521+	c181	3,538+	c177	3,548+	c197	3,559+	c225

5,347-	c210	5,361-	c189	5,383-	c183	5,389-	c231	5,391-	c161
5,346+	c174	5,353+	c231	5,361+	c221	5,370+	c189	5,373+	c214

6,341-	c224	6,349-	c209	6,355-	c206	6,365-	c185	6,371-	c217
6,304+	c216	6,314+	c209	6,316+	c210	6,317+	c225	6,323+	c221

7,311-	c225	7,323-	c241	7,335-	c219	7,337-	c213	7,353-	c263
7,293+	c187	7,304+	c244	7,307+	c225	7,314+	c215	7,320+	c201

10,269-	c233	10,271-	c214	10,277-	c224	10,281-	c210	10,283-	c211
10,241+	c175	10,244+	c215	10,248+	c199	10,268+	c243	10,272+	c212

11,229-	c217	11,233-	c181	11,241-	c220	11,257-	c226	11,263-	c209
11,233+	c200	11,254+	c228	11,263+	c252	11,269+	c202	11,271+	c267

12,233-	c215	12,239-	c202	12,247-	c209	12,257-	c218	12,269-	c205
12,232+	c181	12,253+	c169	12,254+	c230	12,256+	c228	12,265+	c185